Science Trivia Questions And Answers 5j553h

Science Trivia Questions and Answers

Take the challenge of our fun science quizzes for kids as well as a range of printable word searches and free puzzle worksheets. Enjoy quizzes on subjects such as chemistry, biology, physics, space, earth, animals, the human body and more. The quizzes offer great elementary science practice and the questions & answers can be used in conjunction with our other free online science resources. Questions range from easy to hard and are followed by a full list of answers so you can check how well you did. Learn interesting science facts and information and have some fun along the way. Get started by making use of all the great teaching ideas, fun trivia and free worksheets.

Human Body Quiz Test your knowledge of the human body by taking our fun human body quiz. The human body is an amazing structure which contains a wide range of complex parts and processes. Do you know about the body‟s important organs, digestive processes and brain functions? Learn more about the anatomy of the human body as well as parts such as the heart, bones, eyes, skin, muscles, skeleton, ears and nose.

1. What is the name of the biggest part of the human brain? 2. The colored part of the human eye that controls how much light es through the pupil is called the? 3. What is the name of the substance that gives skin and hair its pigment? 4. The muscles found in the front of your thighs are known as what? 5. True or false? The two chambers at the bottom of your heart are called ventricles. 6. What substance are nails made of? 7. What is the human body‟s biggest organ? 8. The innermost part of bones contains what? 9. True or false? An adult human body has over 500 bones. 10. How many lungs does the human body have? 11. Another name for your voice box is the? 12. The two holes in your nose are called? 13. Your tongue is home to special structures that allow you to experience tastes such as sour, sweet, bitter and salty, what is their name? 14. The bones that make up your spine are called what? 15. The shape of DNA is known as? 16. The flow of blood through your heart and around your body is called? 17. The bones around your chest that protect organs such as the heart are called what? 18. What is the name of the long pipe that shifts food from the back of your throat down to your stomach? 19. True or false? Your ears are important when it comes to staying balanced. 20. The outside layer of skin on the human body is called the?

Human Body Quiz Answers

1. The cerebrum

2. Iris

3. Melanin

4. Quadriceps

5. True

6. Keratin

7. The skin

8. Bone marrow

9. False (there are 206)

10. 2

11. Larynx

12. Nostrils

13. Taste buds

14. Vertebrae

15. A double helix

16. Circulation

17. Ribs

18. The esophagus

19. True

20. Epidermis

Animal Quiz Take our fun animal quiz and test your knowledge of the animal kingdom. How much do you know about animals such as the tiger, lion, shark, cat, crocodile, giraffe, snake, rabbit and spider? Enjoy our fun trivia for kids and answer as many of the thirty questions related to the animal kingdom as you can. Questions vary from easy to challenging and cover everything from insects to pets, wild animals, fish, birds and reptiles 1. What food makes up nearly all (around 99%) of a Giant Panda‟s diet? 2. True or false? Mice live for up to 10 years. 3. What is the name of the phobia that involves an abnormal fear of spiders? 4. What is the largest type of „big cat‟ in the world? 5. True or false? Crocodiles have no sweat glands so they use their mouths to release heat. 6. Eagles are very good at spotting potential prey from a long distance, why? 7. What are female elephants called? 8. True or false? Bats are mammals. 9. Bees are found on every continent of earth except for one, which is it? 10. True or false? Cats spend an average of 13 to 14 hours a day sleeping. 11. What is the fastest land animal in the world? 12. A „doe‟ is what kind of animal? 13. True or false? Cougar‟s are herbivores. 14. Groups of lions are known as what? 15. Is a dolphin a mammal? 16. What is the largest land animal in the world? 17. True of false? Snakes have slimy skin. 18. What is the only continent on earth where Giraffes live in the wild? 19. How many pairs of wings does a bee have? 20. What type of animal is the largest primate in the world? 21. Is a shark a fish or a mammal? 22. What is the most recognizable feature of a hedgehog‟s appearance? 23. True or false? Owls are far-sighted, meaning that anything within a few inches of their eyes can‟t be seen properly. 24. What is the name of an adult female horse? 25. What are baby goats called? 26. What is the tallest animal in the world?

27. True or false? Rabbits are born blind. 28. What is the most recognizable physical feature of the male lion? 29. How many legs does a spider have? 30. The crocodile species is believed to have been around for how long? 2 million years or 200 million years?

Animal Quiz Answers

1. Bamboo 2. False - Captive mice live for up to 2 and a half years while wild mice only live for an average of around 4 months. 3. Arachnophobia 4. The tiger, weighing up to 300 kilograms (660 pounds). 5. True - They often sleep with their mouth open to cool down. 6. Because they have excellent eyesight. 7. Cows 8. True 9. Antarctica 10. True 11. The cheetah (it can reach speeds of up to 120kph – 75mph). 12. A female deer. 13. False - They are carnivores. 14. Prides 15. Yes 16. The elephant - The largest on record weighed around 12,000 kilograms! (26,000 lb). 17. False - Snakeskin is smooth and dry. 18. Africa 19. 2 20. The Gorilla 21. A fish 22. Their spines of spiky hair. 23. True 24. A mare 25. Kids 26. The giraffe - The average height is around 5 metres (16ft) and the tallest on record stood nearly 6 metres (20 ft) tall. 27. True 28. Its mane 29. 8 30. 200 million years

Biology Quiz The study of biology covers a wide range of interesting topics that include genetics, cells, photosynthesis, microbiology, ecology, botany, evolution, DNA, viruses and bacteria. Challenge your knowledge of these topics by taking our fun biology quiz. 1. Which famous scientist introduced the idea of natural selection? 2. A person who studies biology is known as a? 3. Botany is the study of? 4. Can frogs live in salt water? 5. True or false? The common cold is caused by a virus. 6. Animals which eat both plants and other animals are known as what? 7. Bacterial infections in humans can be treated with what? 8. A single piece of coiled DNA is known as a? 9. A group of dog offspring is known as a? 10. The area of biology devoted to the study of fungi is known as? 11. What is the name of the process used by plants to convert sunlight into food? 12. The death of every member of a particular species is known as what? 13. The process of pasteurization is named after which famous French microbiologist? 14. True or false? A salamander is a warm blooded animal? 15. A change of the DNA in an organism that results in a new trait is known as a?

Biology Quiz Answers

1. Charles Darwin

2. Biologist

3. Plants

4. No

5. True

6. Omnivores

7. Antibiotics

8. Chromosome

9. Litter

10. Mycology

11. Photosynthesis

12. Extinction

13. Louis Pasteur

14. False

15. Mutation

Space Quiz Space is a mysterious place but there are plenty of things we are sure about when it comes to that vast space that surrounds us here on earth. Challenge what you think you know with our fun space quiz. Perfect for kids, this quiz will get you thinking about the fascinating topics of space and astronomy. Test your knowledge of planets, stars, moons, astronauts, our solar system, galaxy and more space related trivia. 1. What is the closest planet to the Sun?

2. What is the name of the 2nd biggest planet in our solar system? 3. What is the hottest planet in our solar system? 4. What planet is famous for its big red spot on it? 5. What planet is famous for the beautiful rings that surround it? 6. Can humans breathe normally in space as they can on Earth? 7. Is the sun a star or a planet? 8. Who was the first person to walk on the moon? 9. What planet is known as the red planet? 10. What is the name of the force holding us to the Earth? 11. Have human beings ever set foot on Mars? 12. What is the name of a place that uses telescopes and other scientific equipment to research space and astronomy? 13. What is the name of NASA‟s most famous space telescope? 14. Earth is located in which galaxy? 15. What is the name of the first satellite sent into space? 16. Ganymede is a moon of which planet? 17. What is the name of Saturn‟s largest moon? 18. Olympus Mons is a large volcanic mountain on which planet? 19. Does the sun orbit the Earth? 20. Is the planet Neptune bigger than Earth?

Space Quiz Answers

1. Mercury

2. Saturn

3. Venus

4. Jupiter

5. Saturn

6. No

7. A star

8. Neil Armstrong

9. Mars

10. Gravity

11. No

12. An observatory

13. Hubble Space Telescope

14. The Milky Way Galaxy

15. Sputnik

16. Jupiter

17. Titan

18. Mars

19. No

20. Yes

Chemistry Quiz Chemistry is an amazing subject which combines a number of different sciences, attempting to make sense of the complicated world we live in. Try our fun chemistry quiz and see what you really know about topics such as organic chemistry, atoms, reactions, acids and bases. It‟s a good practice test for kids or students with an exam and even if you think you're already an expert you can certainly learn a thing or two, increasing your knowledge of both chemistry and general science trivia at the same time. 1. What is the first element on the periodic table? 2. What is the centre of an atom called? 3. True or false? Acids have a pH level below 7. 4. What is the main gas found in the air we breathe?

5. True or false? An electron carries a positive charge. 6. Famous New Zealand scientist Ernest Rutherford was awarded a Nobel Prize in which field? 7. What is the chemical symbol for gold? 8. K is the chemical symbol for which element? 9. What orbits the nucleus of an atom? 10. At room temperature, what is the only metal that is in liquid form? 11. True or false? A neutron has no net electric charge. 12. A nuclear reaction where the nucleus of an atom splits into smaller parts is known as nuclear fission or nuclear fusion? 13. What is H20 more commonly known as? 14. What is the third most common gas found in the air we breathe? 15. What is the name given to substances that are initially involved in a chemical reaction? 16. True or false? Bases have a pH level below 7. 17. Is sodium hydroxide (NaOH) an acid or base? 18. Atoms of the same chemical element that have different atomic mass are known as? 19. True or false? A proton carries a positive charge. 20. What is the fourth most abundant element in the universe in of mass?

Chemistry Quiz Answers

1. Hydrogen

2. A nucleus

3. True

4. Nitrogen (around 78%)

5. False

6. Chemistry

7. Au

8. Potassium

9. Electrons

10. Mercury

11. True

12. Nuclear fission

13. Water

14. Argon (around 1%)

15. Reactants

16. False

17. Base

18. Isotopes

19. True

20. Carbon

Physics Quiz Test how much you know about physics by trying our fun physics quiz. There‟s a range of questions about topics such as energy, motion, friction, magnets, force, gravity and light. 1. When light bends as it enters a different medium the process is known as what? 2. A magnifying glass is what type of lens? 3. Electric resistance is typically measured in what units? 4. A person who studies physics is known as a? 5. Metals expand when heated and do what when cooled? 6. What is the first name of the famous scientist who gave us Newton‟s three laws of motion? 7. What state of the art computer technology is used to train pilots when wanting to copy the experience of flying an aircraft? 8. Electric power is typically measured in what units?

9. The most recognized model of how the universe begun is known as the? 10. Who is the Hubble Space Telescope named after? 11. The wire inside an electric bulb is known as the what? 12. Theoretical physicist James Maxwell was born in what country? 13. Infrared light has a wavelength that is too long or short to be visible for humans? 14. What kind of eclipse do we have when the moon is between the sun and the earth? 15. True or false? Iron is attracted by magnets. 16. What is the earth‟s primary source of energy? 17. Conductors have a high or low resistance? 18. Electric current is typically measured in what units? 19. What scientist is well known for his theory of relativity? 20. Earth is located in which galaxy?

Physics Quiz Answers

1. Refraction

2. Convex

3. Ohms

4. Physicist

5. Contract

6. Isaac

7. A flight simulator

8. Watts

9. Big bang

10. Edwin Hubble

11. Filament

12. Scotland

13. Long

14. A solar eclipse

15. True

16. The sun

17. Low

18. Amperes

19. Albert Einstein

20. The Milky Way galaxy

Take our water quiz for kids and learn more about this vital resource. Check what you understand about water properties, oceans, bottled water, how long a human can survive without water and much more. 1. True or false? Sound travels faster through water than air? 2. Water is made up of what two elements? 3. What is another name for a tidal wave? 4. True or false? The Indian Ocean is the biggest ocean on Earth. 5. The solid state of water is known as what? 6. Can the average human survive without water for a few days or a few weeks? 7. True or false? Pure water is tasteless. 8. Nimbus, cumulus and stratus are types of what? 9. True or false? Water is an example of a chemical element. 10. Does water cover more or less than 50% of the Earth‟s surface? 11. True or false? Water boils at 100 degrees Celsius (212 degrees Fahrenheit). 12. When water is cooled, does it contract or expand? 13. Water freezes at what temperature? 14. True or false? Water is easy to compress.

15. What is the chemical formula of water? 16. The deepest point in all of the world‟s oceans is named what? 17. True or false? The consumption of bottled water has risen significantly over the last few decades. 18. Pure water has a pH level of a around what number? 19. What is the longest river on Earth? 20. True or false? Ice sinks in water.

Water Quiz Answers

1. True

2. Hydrogen and oxygen

3. Tsunami

4. False - Pacific Ocean

5. Ice

6. A few days

7. True

8. Clouds

9. False

10. More - Around 70%

11. True

12. Expand

13. 0 °C (32 °F)

14. False

15. H20

16. Mariana Trench

17. True

18. 7

19. The Nile River

20. False - It floats

Technology Quiz Take our fun technology quiz and learn more about interesting technology subjects such as computers, science innovations, IT, video games, gadgets and the Internet. 1. Solar power generates electricity from what source? 2. Did the Apple iPhone first become available in 2005, 2006 or 2007? 3. In of computing, what does U stand for? 4. True or false? Nintendo was founded after the year 1900. 5. The Hubble Space Telescope is named after which American astronomer? 6. Is the wavelength of infrared light too long or short to be seen by humans? 7. Firefox, Opera, Chrome, Safari and Explorer are types of what? 8. True or false? Gold is not a good conductor of electricity? 9. The technologically advanced humanoid robot ASIMO is made by which car company? 10. True or false? Atomic bombs work by atomic fission. 11. In of computing, what does ROM stand for? 12. Did the original Sony Playstation use CDs or cartridges to play games? 13. What is the Earth‟s primary source of energy? 14. IBM is a well known computer and information technology company, what does IBM stand for? 15. Along with whom did Bill Gates found Microsoft? 16. What science fiction writer wrote the three laws of robotics? 17. True or false? In computing, keyboards are used as input devices. 18. What does the abbreviation WWW stand for?

19. Nano, Shuffle, Classic and Touch are variations of what? 20. True or false? DNA is an abbreviation for „Deoxyribonucleic acid‟.

Technology Quiz Answers

1. The Sun

2. 2007

3. Central Processing Unit

4. False - 1889

5. Edwin Hubble

6. Long

7. Web browsers

8. False

9. Honda

10. True

11. Read Only Memory

12. CDs

13. The Sun

14. International Business Machines

15. Paul Allen

16. Isaac Asimov

17. True

18. World Wide Web

19. The Apple iPod

20. True

Food Quiz How much do you really know about the food you eat? Take our fun food quiz and find out! There are questions relating to a whole range of food related topics including fruit & vegetables, meat, fast food restaurants, cooking, famous meals, health, nutrition and more. 1. The rice dish „paella‟ comes from what country? 2. Deer meat is known by what name? 3. Are humans omnivore, herbivore or carnivore? 4. What food is used as the base of guacamole? 5. The range of vegetables, fruits, meats, nuts, grains, herbs and spices used in cooking are known as what? 6. True or false? India is the world‟s largest producer of bananas. 7. What is the sweet substance made by bees? 8. Lures, reels, rods, hooks, baits and nets are common equipment used in what food gathering method? 9. True or false? McDonald‟s has restaurants in over 100 countries around the world. 10. The „Pizza Hut‟ franchise began in what country? 11. Foods rich in starch such as pasta and bread are often known by what word starting with the letter C? 12. True or false? Trans fats are good for your health. 13. What is another name for maize? 14. Fruit preserves made from citrus fruits, sugar and water are known as what? 15. True or false? „Beefsteak‟ is a variety of tomato. 16. Dairy products are generally made from what common liquid? 17. Do coconut trees grow better in cold or warm climates? 18. True or false? Cooking food often transforms its chemical make up. 19. What is the popular food used to carve jack-o-lanterns during Halloween? 20. Chiffon, marble and bundt are types of what?

Food Quiz Answers

1. Spain

2. Venison

3. Omnivore

4. Avocado

5. Ingredients

6. True

7. Honey

8. Fishing

9. True

10. USA

11. Carbohydrates

12. False

13. Corn

14. Marmalade

15. True

16. Milk

17. Warm

18. True

19. Pumpkins

20. Cake

Earth Quiz Put your knowledge of the earth to the test with our fun earth quiz that‟s perfect for kids. Learn interesting trivia and answer a range of questions on topics such as rocks, air, deserts, oceans, mountains, gas, volcanoes and more. 1. What is the name of the largest ocean on earth? 2. What are the two main metals in the earth‟s core? 3. Which is hotter, the center of the earth or surface of the sun? 4. What do you call molten rock before it has erupted? 5. What do you call it after it has erupted? 6. True or false? You can see the Great Wall of China from space. 7. What do you call a person who studies rocks? 8. Name the three time periods of the dinosaurs. 9. True or false? The Grand Canyon is around 10000 feet (3000 meters) deep. 10. What is the name of the deepest location in the world‟s oceans? 11. Over a long period of time while under extreme heat and pressure, graphite turns into which precious mineral? 12. Outside of Antarctica, what is the largest desert in the world? 13. The gemstone ruby is typically what color? 14. What is the name of the highest mountain on earth? 15. Do stalactites rise from the floor or hang from the ceiling of limestone caves? 16. 'Cascade', 'horsetail', 'plunge' and 'tiered' are types of what? 17. Someone who studies earthquakes is known as a what? 18. What is the name of the layer of earth‟s atmosphere that absorbs the majority of the potentially damaging ultraviolet light from the sun? 19. The mass of the earth is made up mostly of which two elements? 20. What is the second most common gas found in the air we breathe?

Earth Quiz Answers

1. The Pacific Ocean

2. Iron and nickel

3. The center of the earth

4. Magma

5. Lava

6. True

7. A geologist

9. False - 5000 feet (1500 meters)

10. Mariana Trench

11. Diamond

13. Red

14. Mount Everest

15. Hang from the ceiling

16. Waterfall

17. Seismologist

18. The ozone layer

19. Iron (32%) and oxygen (30%)

20. Oxygen (21%)

8. Triassic, Jurassic and Cretaceous 12. The Sahara Desert in Africa

General Science Quiz Take our general science quiz and see how much basic knowledge you have on a range of interesting science topics. Put yourself to the test and learn some fun science facts along the way. There‟s a wide variety of easy general knowledge questions that are perfect for kids while some of the harder ones might even leave adults scratching their heads. 1. What is the biggest planet in our solar system? 2. What is the chemical symbol for the element oxygen? 3. Another name for a tidal wave is a? 4. True or false? Dogs are herbivores. 5. What is the 7th element on the periodic table of elements? 6. What is the name of the long appendage that hangs from an elephants face? 7. True or false? DNA is the shortened form of the term „Deoxyribonucleic acid‟? 8. The highest mountain on earth is? 9. What is the name of the closest star to the earth? 10. True or false? Frogs are cold blooded animals. 11. What is the name of the element with the chemical symbol „He‟? 12. The fear of what animal is known as „arachnophobia‟? 13. Pure water has a pH level of a around? 14. The molten rock that comes from a volcano after it has erupted is known as what? 15. True or false? Yogurt is produced by bacterial fermentation of milk. 16. What is the name of the part of the human skeleton which protects our brain? 17. Is the compound „HCl‟ an acid or base? 18. True or false? The fastest land animal in the world is the zebra. 19. How many bones do sharks have in their bodies? 20. What famous scientist was awarded the 1921 Nobel Prize in Physics for his work on theoretical physics?

General Science Quiz Answers

1. Jupiter

2. O

3. Tsunami

4. False - They are omnivores

5. Nitrogen

6. A trunk

7. True

8. Mount Everest

9. The sun

10. True

11. Helium

12. Spiders

13. 7

14. Lava

15. True

16. The skull

19. 0

20. Albert Einstein

17. An acid (hydrochloric acid) 18. False (it is the cheetah)

Weather Quiz Take our fun weather quiz and see how much you know about climate and weather conditions. The weather can play a big role in our everyday lives with rain, snow, wind, temperature and sunshine all affecting our daily activities. The weather can also come in extremes with storms, tornadoes and hurricanes common in various parts of the world. 1. A thermometer is a device used to measure what? 2. Stratus, cirrus, cumulus and nimbus are types of what? 3. What country experiences the most tornadoes? 4. True or false? A rainbow is a spectrum of light that appears when the Sun shines onto water droplets in the air. 5. Blizzards feature low temperatures, strong winds and heavy _______? 6. Breeze and gale are common used to describe the speed of what? 7. Earth‟s recent temperature rises which have been linked to human activity is known as global _______? 8. True or false? The highest recorded temperature on Earth of 57.8 °C (136 °F) was recorded in Tirat Tsvi, Israel. 9. What is the name of a scientist who studies weather? 10. What is the driest desert on Earth, the Sahara, the Kalahari or the Atacama? 11. True or false? The lowest recorded temperature on Earth of 89.2 °C (−128.6 °F) was recorded at Vostok Station, Antarctica. 12. Balls or irregular lumps of ice that fall from clouds (often during thunderstorms) are known as what? 13. An avalanche features the rapid descent of _______? 14. True of false? The most rain fall ever recorded in one year (Cherrapunji, India) is more than 30 meters. 15. What is the name of a weather instrument used to measure atmospheric pressure? 16. An anemometer is used to measure what? 17. At what temperature is Centigrade equal to Fahrenheit? 18. Trying to predict the weather is known as weather _______? 19. The area of central USA that features many tornadoes is known as Tornado _______? 20. True or false? You see lightning and hear thunder.

Weather Quiz Answers

1. Temperature

2. Clouds

3. USA

4. True

5. Snow

6. Wind

7. Warming

8. False (Al 'Aziziyah, Libya)

9. A meteorologist

10. The Atacama Desert

11. True

12. Hail stones

13. Snow

14. False (25.4 meters)

15. A barometer

16. Wind speed

17. -40 degrees

18. Forecasting

19. Alley

20. True

True or False Quiz Try our true or false science quiz for kids and see how many questions you know the correct answers to. The questions are based on general science knowledge covering everything from chemistry to space, physics, animals, biology, the human body, Earth and more. 1. True or false? Electrons are larger than molecules. 2. True or false? The Atlantic Ocean is the biggest ocean on Earth. 3. True or false? The chemical make up food often changes when you cook it. 4. True or false? Sharks are mammals. 5. True or false? The human body has four lungs. 6. True or false? Atoms are most stable when their outer shells are full. 7. True or false? Filtration separates mixtures based upon their particle size. 8. True or false? Venus is the closest planet to the Sun. 9. True or false? Conductors have low resistance. 10. True or false? Molecules can have atoms from more than one chemical element. 11. True or false? Water is an example of a chemical element. 12. True or false? The study of plants is known as botany. 13. True or false? Mount Kilimanjaro is the tallest mountain in the world. 14. True or false? Floatation separates mixtures based on density. 15. True or false? Herbivores eat meat. 16. True or false? Atomic bombs work by atomic fission. 17. True or false? Molecules are chemically bonded. 18. True or false? Spiders have six legs. 19. True or false? Kelvin is a measure of temperature. 20. True or false? The human skeleton is made up of less than 100 bones.

True or False Quiz Answers

1. False

2. False - Pacific Ocean

3. True

4. False - Fish

5. False - 2

6. True

7. True

8. False - Mercury

9. True

10. True

11. False

12. True

13. False - Mount Everest

14. True

15. False

16. True

17. True

18. False - 8

19. True

20. False - 206

Acid Base Quiz Take our fun acid base quiz and see how much you know about this interesting science topic. Answer questions about a variety of acids & bases including sulfuric acid, citric acid, ammonia and sodium hydroxide. 1. True or false? Bases change litmus paper to blue. 2. True or false? Ammonia is an acid. 3. True or false? Properties of acids include being corrosive and having a sour taste. 4. True or false? Sulfuric acid is known as a strong acid. 5. True or false? Base solutions have a pH below 7. 6. True or false? The chemical formula for sulfuric acid is H2SO4. 7. True or false? Lemons contain citric acid. 8. True or false? An alkali is an acid. 9. True or false? An anion is an ion with more electrons than protons, giving it a negative charge. 10. True or false? Neutral solutions have a pH of 0. 11. True or false? Acids change litmus paper to red. 12. True or false? The word acid comes from the Latin word acidus (meaning sour). 13. True or false? The chemical formula for sodium hydroxide is NaH. 14. True or false? A cation is an ion with more protons than electrons, giving it a positive charge. 15. True or false? Acetic acid gives vinegar a sour taste and strong smell. 16. True or false? Acid solutions have a pH above 7. 17. True or false? Formic acid is found in bee venom. 18. True or false? Sodium hydroxide is known as a weak base. 19. True or false? DNA is an abbreviation for deoxyribonucleic acid. 20. True or false? Potassium hydroxide contains potassium, oxygen and helium.

Acid Base Quiz Answers

1. True

2. False

3. True

4. True

5. False

6. True

7. True

8. False

9. True

10. False - 7

11. True

12. True

13. False - NaOH

14. True

15. True

16. False

17. True

18. False

19. True

20. False - Hydrogen not helium

Chemical Elements Quiz Name the correct symbol for as many of the first 110 chemical elements in the periodic table as you can. All chemical matter found on earth comes from these elements. Each has a distinct atom featuring an atomic number (the number of protons in its nucleus) and electrons. The most common elements found in our universe are hydrogen, helium, oxygen and carbon while elements with an atomic mass of 83 or over are unstable and experience radioactive decay. The following elements are listed according to atomic number. How many of the chemical symbols do you know?

1. Hydrogen

2. Helium

3. Lithium

4. Beryllium

5. Boron

6. Carbon

7. Nitrogen

8. Oxygen

9. Fluorine

10. Neon

11. Sodium

12. Magnesium

13. Aluminium

14. Silicon

15. Phosphorus

16. Sulfur

17. Chlorine

18. Argon

19. Potassium

20. Calcium

21. Scandium

22. Titanium

23. Vanadium

24. Chromium

25. Manganese

26. Iron

27. Cobalt

28. Nickel

29. Copper

30. Zinc

31. Gallium

32. Germanium

33. Arsenic

34. Selenium

35. Bromine

36. Krypton

37. Rubidium

38. Strontium

39. Yttrium

40. Zirconium

41. Niobium

42. Molybdenum

43. Technetium

44. Ruthenium

45. Rhodium

46. Palladium

47. Silver

48. Cium

49. Indium

50. Tin

51. Antimony

52. Tellurium

53. Iodine

54. Xenon

55. Cesium

56. Barium

57. Lanthanum

58. Cerium

59. Praseodymium

60. Neodymium

61. Promethium

62. Samarium

63. Europium

64. Gadolinium

65. Terbium

66. Dysprosium

67. Holmium

68. Erbium

69. Thulium

70. Ytterbium

71. Lutetium

72. Hafnium

73. Tantalum

74. Tungsten

75. Rhenium

76. Osmium

77. Iridium

78. Platinum

79. Gold

80. Mercury

81. Thallium

82. Lead

83. Bismuth

84. Polonium

85. Astatine

86. Radon

87. Francium

88. Radium

89. Actinium

90. Thorium

91. Protactinium

92. Uranium

93. Neptunium

94. Plutonium

95. Americium

96. Curium

97. Berkelium

98. Californium

99. Einsteinium

100. Fermium

101. Mendelevium

102. Nobelium

103. Lawrencium

104. Rutherfordium

105. Dubnium

106. Seaborgium

107. Bohrium

108. Hassium

109. Meitnerium

110. Darmstadtium

Chemical Elements Quiz Answers

1. Hydrogen - H

2. Helium - He

3. Lithium - Li

4. Beryllium - Be

5. Boron - B

6. Carbon - C

7. Nitrogen - N

8. Oxygen - O

9. Fluorine - F

10. Neon - Ne

11. Sodium - Na

12. Magnesium - Mg

13. Aluminium - Al

14. Silicon - Si

15. Phosphorus - P

16. Sulfur - S

17. Chlorine - Cl

18. Argon - Ar

19. Potassium - K

20. Calcium - Ca

21. Scandium - Sc

22. Titanium - Ti

23. Vanadium - V

24. Chromium - Cr

25. Manganese - Mn

26. Iron - Fe

27. Cobalt - Co

28. Nickel - Ni

29. Copper - Cu

30. Zinc - Zn

31. Gallium - Ga

32. Germanium - Ge

33. Arsenic - As

34. Selenium - Se

35. Bromine - Br

36. Krypton - Kr

37. Rubidium - Rb

38. Strontium - Sr

39. Yttrium - Y

40. Zirconium - Zr

41. Niobium - Nb

42. Molybdenum - Mo

43. Technetium - Tc

44. Ruthenium - Ru

45. Rhodium - Rh

46. Palladium - Pd

47. Silver - Ag

48. Cium - Cd

49. Indium - In

50. Tin - Sn

51. Antimony - Sb

52. Tellurium - Te

53. Iodine - I

54. Xenon - Xe

55. Cesium - Cs

56. Barium - Ba

57. Lanthanum - La

58. Cerium - Ce

59. Praseodymium - Pr

60. Neodymium - Nd

61. Promethium - Pm

62. Samarium - Sm

63. Europium - Eu

64. Gadolinium - Gd

65. Terbium - Tb

66. Dysprosium - Dy

67. Holmium - Ho

68. Erbium - Er

69. Thulium - Tm

70. Ytterbium - Yb

71. Lutetium - Lu

72. Hafnium - Hf

73. Tantalum - Ta

74. Tungsten - W

75. Rhenium - Re

76. Osmium - Os

77. Iridium - Ir

78. Platinum - Pt

79. Gold - Au

80. Mercury - Hg

81. Thallium - Tl

82. Lead - Pb

83. Bismuth - Bi

84. Polonium - Po

85. Astatine - At

86. Radon - Rn

87. Francium - Fr

88. Radium - Ra

89. Actinium - Ac

90. Thorium - Th

91. Protactinium - Pa

92. Uranium - U

93. Neptunium - Np

94. Plutonium - Pu

95. Americium - Am

96. Curium - Cm

97. Berkelium - Bk

98. Californium - Cf

99. Einsteinium - Es

100. Fermium - Fm

101. Mendelevium - Md 102. Nobelium - No

103. Lawrencium - Lr

104. Rutherfordium - Rf 105. Dubnium - Db

106. Seaborgium - Sg

108. Hassium - Hs

109. Meitnerium - Mt

107. Bohrium - Bh

110. Darmstadtium - Ds

Dog Quiz Test your knowledge of dogs with our fun dog quiz for kids, can you answer questions about popular breeds, life expectancy, senses and their diet? Dogs have shared a special relationship with human beings for thousands of years. They are cute and playful as a puppy and it doesn‟t take most of them long to mature into obedient pets that are a joy to live with. They are also unique animals that offer a number of interesting facts and trivia. So how many of these facts do you know? 1. Is the domestic dog a carnivore, omnivore or herbivore? 2. True of false? Like most mammals, dogs have color vision which is similar to red-green color blindness in humans. 3. What is a dog‟s most powerful sense? 4. The average lifespan of dogs is around 5 to 8 years, 10 to 13 years or 15 to 18 years? 5. According to the American Kennel Club, what is the most popular dog breed found in the USA? 6. True or false? Dogs are susceptible to parasites such as ticks, mites and fleas. 7. Who has better hearing, a human or a dog? 8. What is the name of the phobia for someone who has a fear of dogs? 9. True or false? The tallest dog in the world stands over 150cm in height. 10. Because of dogs unique relationship with humans they are often referred to as man‟s best........?

Dog Quiz Answers 1. Omnivore - Dog‟s can healthily eat a range of foods including grains and vegetables as part of their daily nutritional requirements without the need to solely rely on meat. 2. True 3. Its sense of smell. 4. 10 to 13 years 5. The Labrador Retriever 6. True 7. A dog - Dogs can hear both above and below humans on the frequency spectrum, can pinpoint sound direction faster and can hear sounds that are four times as far away as what humans can hear. 8. Cynophobia 9. False - The tallest dog is a Great Dane that stands 106.7 cm (42.2 in) at the top of the shoulder.

10. Friend

Atom Quiz Take our interesting atom quiz and see how much you know about important parts of the atom such as the electron, proton, neutron and nucleus. 1. True or false? Protons have a negative charge. 2. True or false? Atoms are bigger than neutrons. 3. True or false? Protons and neutrons are part of the nucleus. 4. True or false? Electrons have a positive charge. 5. True or false? Electrons are not part of the nucleus. 6. True or false? Protons are bigger than atoms. 7. True or false? Subatomic particles are found inside atoms. 8. True or false? Nucleon is a collective name for two particles, the neutron and proton. 9. True or false? Neutrons have a negative charge. 10.True or false? An electron has a greater mass than a proton.

Atom Quiz Answers

1. False

2. True

3. True

4. False

5. True

6. False

7. True

8. True

9. False

10. False

States of Matter Quiz Try our states of matter quiz and find out how much you know about matter as a solid, liquid or gas. Do you know how to describe matter changing from one state to another? How about what condensation and melting points are? 1. When a solid changes to a liquid it is called what? 2. True or false? Liquids are easy to compress. 3. When a gas changes into a liquid it is called what? 4. True or false? The particles of a gas are packed tightly together. 5. When solids reach their melting points they become what? 6. True or false? Plasma is a state of matter. 7. When a gas reaches its condensation point it becomes a what? 8. True or false? Solids do not take the shape of the container they are in. 9. What is it called when a solid changes directly into a gas? 10. True or false? Gases are hard to compress.

States of Matter Quiz Answers

1. Melting

2. False

3. Condensation

4. False

5. Liquids

6. True

7. Liquid

8. True

9. Sublimination

10. False

Nature Quiz Try our nature quiz for kids and learn more about topics such as the environment, recycling, animals, plants and some of the natural features that make Earth special. Find a range of interesting nature based questions and answers that feature fun facts and awesome trivia. 1. What is the name of the world‟s largest reef system? 2. Do male or female mosquitoes bite people? 3. True or false? Earth Day is held on June 18. 4. What state of the USA is the Grand Canyon located in? 5. True or false? The Dead Sea is 8.6 times more salty than the ocean. 6. What are the 3 R‟s of recycling? 7. True or false? The horn of a rhinoceros is made from bone. 8. What famous islands west of Ecuador were extensively studied by Charles Darwin? 9. Ayers Rock in Australia is also know as what? 10. True or false? Burning or logging naturally occurring forests is known as deforestation.

Nature Quiz Answers

1. Great Barrier Reef

2. Female

3. False (April 22)

4. Arizona

5. True

6. Reduce, reuse and recycle

7. False (keratin)

8. Galapagos Islands

9. Uluru

10. True

Plant Quiz How much do you know about plants? Find out with our fun plant quiz for kids. Find questions and answers related to a range of topics including flowers, trees, forests and more.

Enjoy the cool facts and fun trivia while learning more about plants. 1. The scientific study of plant life is known as what? 2. The process of plants using energy from sunlight to turn carbon dioxide into food is known as what? 3. True or false? In the right conditions bamboo can grow over 60cm (24in) in just one day. 4. The movement of pollen from the anthers to the stigma of a flower is known as what? 5. Amber is made from fossilized tree _____? 6. True or false? Humans were on Earth before plants. 7. What grain has the highest level of worldwide production? (Hint: Rice is second) 8. A trailing or climbing plant is also known as a _____? 9. True or false? Pitcher plants are carnivorous. 10. The Japanese word “sakura” means the blossoming of what kind of tree?

Plant Quiz Answers

1. Botany

2. Photosynthesis

3. True

4. Pollination

5. Resin

6. False

7. Maize (corn)

8. Vine

9. True

10. Cherry tree

Heat Quiz Take our heat quiz and learn some new and interesting information about energy transfer, boiling points and what happens to water at freezing temperatures. 1. True or false? The boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit). 2. When water is cooled, does it expand or contract? 3. True or false? The highest temperature ever recorded on Earth is 42.4 °C (108.3 °F). 4. Heat from the sun gets to the Earth by radiation, conduction or convention? 5. What is the freezing temperature of water? 6. True or false? Kelvin, Celsius and Fahrenheit are all measures of temperature. 7. True or false? 100 Kelvin is the temperature of absolute zero. 8. Substances that don‟t conduct heat are known as what? 9. True or false? Heat is a form of energy. 10. At what temperature is Fahrenheit equal to Centigrade?

Heat Quiz Answers

1. True

2. Expand

3. False - 57.8 °C (136 °F)

4. Radiation

5. 0 degrees Celsius (32 degrees Fahrenheit)

6. True

7. False - 0 Kelvin

8. Insulators

9. True

10. -40 degrees

Metal Quiz How much do you know about metal? Take our metal quiz and find out! Use our trivia questions & answers to learn more about elements such as gold, silver and sodium as well as alloys such as bronze and steel. 1. What is the chemical symbol of gold? 2. True or false? Steel is a chemical element. 3. What is the most common metal found on Earth? 4. True or False? Sodium is a very reactive metal. 5. What three kinds of medals are awarded at the Olympic Games? 6. True or false? Metal bonding with metal is known as a metallic bond. 7. Bronze is made from what two metals? 8. What is the only metal that is liquid at room temperature? 9. True or false? Sterling silver is made up of less than 50% silver by weight. 10.What metal has the chemical symbol Pb?

Metal Quiz Answers

1. Au

2. False - Alloy

3. Iron

4. True

5. Gold, silver and bronze

6. True

7. Copper and tin

8. Mercury

9. False - Over 92%

10. Lead

Sports Science Quiz Take the challenge of our sports science quiz. Find a range of interesting questions and answers related to sports physics, injuries, medicine, equipment, technology and fun trivia. 1. Which decelerates faster, a bton shuttlecock or a baseball? 2. True or false? Lower tension on a tennis racquet produces more control and less power. 3. In the Winter Olympic sport of curling, what type of rock are the curling stones made from?

4. True or false? Olympic gold medals contain more silver than gold. 5. How high is a regulation sized basketball hoop? 6. Does the chronic injury known as plantar fasciitis affect hands or feet? 7. True of false? Astronaut Alan Shepard hit a golf ball while on the moon in 1971. 8. What is typically the slowest swimming stroke, freestroke, backstroke, breaststroke or butterfly? 9. True or false? The official distance of a marathon is 44 kilometres (27.340 miles). 10. Does an injury to your anterior cruciate ligament affect your arm or leg? 11. True or false? Your body only produces lactic acid during intensive physical activity. 12. Do the fastest male 100m sprinters in the world average above or below 30 kph (18.64mph)? 13. True or false? Dimples on a golf ball help reduce drag and increase the distance the ball flies. 14. Is the diameter of a regulation basketball hoop 2 times, 3 times or 4 times wider than the diameter a regulation basketball? 15. True or false? The fastest recorded tennis serve is faster than 150 mph (241 kph).

Sports Science Quiz Answers

1. Shuttlecock

2. False (less control, more power)

3. Granite

4. True

5. 10 foot (3 metres)

6. Feet

7. True

8. Breaststroke

9. False - 42.195 kilometres (26.219 miles)

10. Leg

11. False (it‟s produced all the time)

12. Above - around 36 kph (22.37 mph)

13. True

14. 2 times

15. True - 155 mph (249 kph)

Electricity Quiz Take our electricity quiz for kids and learn some new information about electric currents, batteries, electrical power, light bulbs, conductors and more. 1. Electric current is measured using what device? 2. True or false? Batteries convert chemical to electrical energy. 3. In of electricity, what does DC stand for? 4. The wire inside an electric bulb is known as the what? 5. Conductors have a high or low resistance? 6. True or false? The concept of electric fields was first introduced by Albert Einstein. 7. Electric resistance is typically measured in what units? 8. In of electricity, what does AC stand for? 9. Electric power is typically measured in what units? 10. True or false? You can extend battery life by storing batteries at a low temperature.

Electricity Quiz Answers

1. Ammeter

2. True

3. Direct current

4. Filament

5. Low

6. False (Michael Faraday)

7. Ohms

8. Alternating current

9. Watts

10. True

Dinosaur Quiz Put your knowledge to the test with this fun dinosaur quiz for kids. Answer a range of interesting questions related to everything from the Tyrannosaurus rex to the Diplodocus. How much do you know about dinosaur time periods, which dinosaurs were herbivores and which were carnivores, what they looked like and how many legs they moved on? Give it your best shot, 1. How many horns did Triceratops have? 2. True or false? The name dinosaur means „terrible lizard‟. 3. Which came first, the Jurassic or Cretaceous Period? 4. Was Diplodocus a carnivore or herbivore? 5. True of false? Tyrannosaurus rex was the biggest dinosaur ever. 6. True or false? Iguanodon was one of three dinosaurs that inspired the appearance of Godzilla. 7. Did Theropods such as Allosaurus and Carnotaurus move on two legs or four? 8. Apatosaurus is also widely known by what other name? 9. True or false? Most dinosaurs became extinct during an event that occurred 500 years ago. 10. What type of dinosaur features on the logo of the Toronto based NBA basketball team? 11. True or false? Dinosaur fossils have been found on every continent of Earth. 12. What dinosaur themed book was turned into a blockbuster movie in 1993? 13. True or false? Ankylosaurus featured hug plates of bone that acted as body armor. 14. Did Sauropods such as Brachiosaurus and Diplodocus move on two legs or four? 15. True or false? Pentaceratops was the first dinosaur to be officially named. 16. Which came first, the Jurassic or Triassic Period? 17. True or false? The US state of Colorado lists the Allosaurus as its state dinosaur. 18. What weighed more, a fully grown Spinosaurus or Deinonychus? 19. A person who studies fossils and prehistoric life such as dinosaurs is known as a what? 20. True or false? Birds evolved from dinosaurs.

Dinosaur Quiz Answers

1. Three

2. True

3. The Jurassic Period

4. Herbivore

5. False

6. True

7. Two

8. Brontosaurus

9. False (65 million years ago) 10. Raptor (Velociraptor)

11. True

12. Jurassic Park

13. True

14. Four

15. False (Megalosaurus 1824)

16. The Triassic Period

17. False (Stegosaurus)

18. Spinosaurus

19. Paleontologist

20. True

Engineering Quiz Enjoy the challenge of our fun engineering quiz for kids. Test how much you know about structures, dams, bridges, famous landmarks and more. 1. What kind of bridge is the Golden Gate Bridge in San Francisco? 2. In electricity, voltage is measured in volts while current is measured in …….? 3. The Panama Canal s which two oceans? 4. Is a mangonel a type of catapult or bridge? 5. The Hoover dam is on the border of which two U.S. states? 6. In what country is the Taj Mahal found? 7. Did the Eiffel Tower open in 1789 or 1889? 8. The Great Sphinx of Giza has the head of a human and the body of a what? 9. In of engineering software, what does CAD stand for? 10. Which country gave the Statue of Liberty to the USA as a gift?

Engineering Quiz Answers

1. Suspension Bridge

2. Amperes (amps)

3. Atlantic and Pacific

4. Catapult

5. Arizona and Nevada

6. India

7. 1889

8. Lion

9. Computer Aided Design

10.

Amaze yourself and your friends with these science facts! This is a collection of fun and interesting science facts. When you crack a whip, it makes a sharp sound because the tip of the whip is traveling faster than the speed of sound. It is a sort of mini sonic boom!  You could theoretically lose weight eating celery since it takes more calories to digest celery than are contained in the vegetable.  Shark teeth are as hard as steel.  The only letter not used in the periodic table is J.  Lobsters have blue blood.  Sound travels about four times faster in water than in air.  2 and 5 are the only prime numbers that end in 2 or 5.  Women blink nearly twice as often as men.  The billionth digit of pi is 9. (Source: Ben Peoples)  On average, it takes a person 7 minutes to fall asleep.  The peanut is a member of the bean or legume family and not a nut.  The prefix 'numbus' in a cloud name means the cloud produces precipitation.  Anemometers measure wind speed.  The only two planets in our solar system that do not have moons are Mercury and Venus.  Bronze is an alloy of copper and tin.





Oxygen is the most common element in the Earth's crust.

1) True or false - there are 206 bones in an adult human body and 300 bones in an infants body?

True. Some bones in infants skulls have not yet fused together.

2) Where does sound travel faster; water or air?

Water.

3) What type of organism makes up the oldest known fossil?

Blue-green algae from South Africa at 3.2 billion years old.

4) True or false- most of the dust in your home is made of human skin?

True - up to 70%!

5) True or false - sterling silver is pure silver?

False. It contains up to 7.5% copper

6) Can you lick your elbow?

No. Now be honest, did you try?

7) In of attributed human deaths which are more dangerous; snakes, bees, sharks or house flies?

House flies. They are vectors for disease causing bacteria.

8) If you go into space, do you get taller?

Yes, the cartilage disks in your spine expand under zero gravity.

9) What is the hardest substance in the human body?

Tooth enamel.

10) Can you fold a piece of paper in half 7 times?

No, at least not using everyday paper. NB: We've had some about this one. The 'Mythbusters' show did try this and get 8 folds, however this required a paper sheet the size of a football field and further folding required a steamroller! Check this link. Of course, this is a wikipedia stub and as such needs further verification on it's statements. We've followed the stated instructions and only achieved a "7 fold" a couple of times. For most cases it really isn't that possible. Thanks for the !

11) What is trepanning?

An ancient form of medicine which involved making holes in human skull to relieve pressure; don't try at home!

12) Is Obsidian an igneous, sedimentary or metamorphic rock?

Igneous.

13) When and where was the abacus At least 2000 years ago. It was invented in Mesopotamia, most invented? likely by the Babylonians. 14) What does T/IP stand for?

Transmission Control Protocol / Internet Protocol.

15) What survives impacting Earth's Meteorite. surface; a meteor, a meteorite or an asteroid? 16) What causes anAurora?

Charged particles from solar wind

17) True or false; your body's temperature rises slightly during digestion?

True

18) What does the Scoville Heat Unit The heat of chilies Scale measure? 19) Is a tomato a fruit or vegetable? A fruit. 20) What's the highest recorded surface wind speed?

372km/h! Over Mt Washington, New Hampshire on April 12, 1934.

21)Where are the three smallest bones in the human body? What are they called?

In the middle ear. Collectively called ossicles, the 3 bones are the Malleus (hammer), Incus (anvil) & Stapes (stirrup).

22) What is the collective name of Benthos animals and plants that live on a lake bottom? 23) What is the largest living structure on Earth?

The Great Barrier Reef, Australia

24) What is the name of the layer of air closest to us in the atmosphere?

Troposphere

25) What is the strongest known magnet in the Universe?

A Neutron Star

26) What temperature and pressure is needed to convert graphite into a diamond?

3000 degrees celsius and 100,000 atmospheres. That's 10132500 kPA, at least 20,000 times more pressure than the pressure inside the average bike tire!

27) True or false - is lightning 3 times hotter than the Sun?

True

28) Which chemical causes the burning taste sensation when eating chilies?

Capcaicin

29) How much salt does the average Around 250 grams. human body contain?

30) Which is the only metal that is liquid at room temperature?

Mercury

31) Which is the hottest planet in the Venus, surface temperature 460oC solar system? 32) What's the lifespan of a human red blood cell?

Around 120 days.

33) What is oldest living thing known A bristlecone pine in California... it's about 4600 years old! on Earth? 34) True or false; A modern human's True. brain is smaller than a Neanderthal's brain? 35) What is the world's tallest grass? Bamboo. Some species reach up to 39 metres in height. 36) What formation on Earth can have the names tabular, blocky, wedge, dome, pinnacle, dry dock, growler or bergy bit?

Icebergs.

37) Which crystalline formations are on cave ceilings; stalagmites or stalactites?

Stalactites.

38) Who invented the first battery?

Count Alessandro Volta

39) What is the longest type of cell in The nerve cell. the body? 40) How far is the moon away from Earth?

Around 376 600 km away.

41) What Australian timber made theLondon docks?

Turpentine; Syncarpia glomulifera

42) What is opposite to matter?

Antimatter.

43) How old is our Sun?

5 billion years... we think...

44) Why do bubbles pop?

They get too dry from the surrounding air.

45) True or false; when lighting hits True. a tree the water inside the tree boils and expands, blowing the tree apart? 46) If I kept walking in a straight line People often favor one leg over the other. It is possible that over on a flat surface with no visible time the discrepancy between the two leg strides may indeed features, is it possible to walk in cause you to walk in circles. circles eventually? 47) If you mix all light colours, do you get black, white or a rainbow?

White. Technically adding all colours of light together is called colour addition.

48) What is the symbol for Silver?

Ag

49) Is a white gold ring pure gold?

White gold is usually an alloy of gold and a white metal such as silver and palladium. Nickel is no longer used due to skin allergies.

50) What is 'fools gold'?

Iron pyrite crystals.

51) What does a manometer measure?

The pressure of a closed system.

52) What is the Law of Conservation of Energy?

The energy of the Universe is constant; it can neither be created or destroyed but only transferred and transformed.

53) What is the unit measurement for the activity of a radioactive source?

The Becqueral (Bq). 1 Bq = 1 disintegration per second

54) What is a buret?

A long tube of glass usually marked in 0.1mL units that's equipped with a stopcock for the controlled addition of a liquid to a receiving flask

55) Is the stratosphere above or below the troposphere?

Extending 50km above the troposphere.

56) What is a Pyrogen?

A substance that causes fever.

57) What does bile do in you body?

Emulsify fats.

58) What is Xylem?

The hollow woody tissue in plants that carries water and minerals from the roots to throughout the entire plant

59) Where would you find your pinna?

It's your outer ear.

Free science trivia questions and answers including earth, mars, x-rays, the human brain and more.

Fun Trivia questions and answers - Science, astronomy, planets, solar system, minerals, atomic number, human brain, DNA.

What was the original purpose of ENIAC, the world's first "modern" computer? A: To compute ballistic trajectories for artillery shells. ENIAC--an acronym for Electronic numerical integrator and Calculator --was introduced in 1946.

What gives the mineral turquoise its distinctive color? A: Traces of copper.

What percentage of the average human brain is water? A: 80 percent.

What does eccentricity mean to an astronomer? A: The degree to which an orbit deviates from a circle. The eccentricity of Earth's orbit is 0.07.

What is alloyed with steel to make it stainless? A: Chromium.

Which planet weighs over twice as much as all the other known planets combined? A: Jupiter, the largest planet in our solar system.

How fast--in miles per hour---do the fastest messages transmitted by the human nervous system travel? A: 180 to 200 miles per hour.

How many frames --or pictures -- per second are transmitted over American television? A: 30.

In years past what was used as transmission oil in Rolls-Royce automobiles? A: Spermaceti oil--from the sperm whale.

How many pointers were there on the first clocks with hands--made in the fourteenth century? A: Only one, the hour hand.

What temperature does the tungsten filament in an electric light reach when the light is turned on? A: 2,577 Degrees C, or 4,664 degrees F.

Why did German scientist Wilhelm Roentgen name the invisible rays he discovered X-rays? A: Because he had no idea what the mysterious rays were.

Who, long before Columbus, claimed the world was round, reasoning that if it were flat all the stars would be visible from all points on its surface? A: Aristotle, who offered as added proof the fact that the earth casts a spherical shadow on the moon during an eclipse.

When did American sales of cassette recordings sur those of long-playing records? A: In 1983.

What product was originally called the Soundabout when it was introduced in the U.S. in 1970? A: The Sony Walkman.

What do the letters represent in the acronym DNA -- the protein substance inside each cell that transmits genetic information from parent to child? A: Deoxyribonucleic acid.

How long does a nanosecond last? A: one billionth of a second.

How may different chemical reactions occur in the normal human brain every second? A: At least 100,000.

In mathematics, what is the meaning of the term googol? A: It represents the number 1 followed by 100 zeroes.

What word defines sounds too low for human hearing? A: Infrasonic.

How did the element strontium--also known by the symbol SR and the atomic number 38--get its name? A: From Strontian, the Scottish mining village in which it was discovered.

What reply did newspaper tycoon William Randolph Hearst receive when he sent a telegram to a leading astronomer asking "Is there life on Mars? Please cable on thousand words"? A: "Nobody Knows" repeated 500 times.

How many pounds of lunar rock and soil were collected and brought back to Earth from America's six-expeditions to the moon? A: 841.6.

What planet is most like earth in size, mass, density and gravity? A: Venus.

What is the name of the computer program developed by the Los Angeles Police Department to help solve homicides? A: HITMAN--for Homicide Information Tracking Management Automation Network.

What heavenly bodies have astronomers named after Brahms, Beethoven, Bach, the four Beatles and Eric Clapton--among others? A Asteroids.

What "black metal" gave blacksmiths their name? A :Iron.

What word describes the physical components of a computer? A: Hardware.

What planet is the brightest object in the sky, after the sun and moon? A :Venus.

What does a bromidrosiphobic shoe salesman fear? A :Smelly feet.

What planet needs 248 years to meander its way around the sun? A: Pluto.

What did 18th-century astronomer Edmund Halley chart 24 of? A: Comets.

What's a video cameraman doing when he "juices the brick"? A: Recharging the battery.

What New York City hospital founded the first school for nursing in the U.S. , in 1872? A: Bellevue.

What type of telephones did AT&T stop making in the mid-1980s? A: Rotary phones.

What Entertainment Tonight star's voice did the New England Journal of Medicine claim triggered a woman's epileptic seizures? A :Mary Hart's.

What planet is named after the Greek god who personified the sky? A :Uranus.

What home appliance did the U.S. produce seven million of in 1953, up from 6,000 in 946? A: The television.

What are you forbidden to do in a "snuff zone"? A: Smoke.

What teenage year does an American first develop phobias in, on average? A: Thirteen.

Who would send you an e-mail message with the return address "[email protected]"? A: Bill Gates.

What innovation decreases the odds of hitting the car in front of you, but increases the odds of being hit by the car behind you? A: Anti-lock brakes.

What red-blooded body organ are vitamins A, B, D, E, and K stored in? A: The Liver.

What's the positively charged particle in the nucleus of an atom called? A: A proton.

What cartoonist has had three insect species named after him? A :Gary Larson.

What did William Stanley invent in 1885 to transfer the current of one circuit to another? A : The transformer.

What is a siderodromophobic hobo afraid to hitch a ride on? A: Trains.

What country was India ink developed in? A: China.

What three-letter word denotes the residue of combustion or incineration? A: Ash.

What fiber-optic instrument allows surgeons to see and repair damage within ts? A: An arthroscope.

What photo company brags that with their products, "there really are no negatives"? A :Polaroid.

What high-tech mogul appeared on a 1995 cover of Time headlined "Master of the Universe"? A: Bill Gates.

What time period is sandwiched between the Cretaceous and Triassic? A: The Jurassic.

What suntan lotion was developed by Dr. Ben Green in 1944 to protect pilots who bailed out over the Pacific? A: Coppertone.

What colorless, odorless substance is the main constituent of natural gas? A: Methane.

What was the first place name uttered by a man on the moon? A: Houston.

What does an AutoCut VCR automatically cut from TV programs? A: Commercials.

What early scientist, after being forced to declare the Earth was motionless, muttered: "Nevertheless, it does move"? A :Galileo.

What typewriter brand was invented by a man whose father made a well-known flintlock rifle? A: Remington.