Uv Bead Lab -6 4a304z
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Racquel Fox October 24, 2014 Science 5˚ UV BEAD LAB
Problem/Background: The sun releases energy through wavelengths, visible light, infrared radiation (heat), and ultraviolet, UV, radiation, which you cannot see or feel. Ultraviolet radiation is the shortest wavelength of the three kinds, but also has a higher energy than visible light. Exposure to UV rays can effect you positively or negatively, it depends on the ways in which you protect yourself from it. The amount of UV ray exposure we get from the sun depends on the time of day it is. If, in the morning and afternoon, your shadow is taller than you are, your UV exposure is most likely on the low side. If, during midday, your shadow is shorter than you are, you are definitely being exposed to higher levels of UV radiation. It is known that exposure to the type of UV ray, UVB, helps your skin produce a type of vitamin D, which is beneficial for your bones and muscles. However, even with a benefit for bones and muscles from UV rays, overexposure to UV rays is the leading cause of skin cancer. The skin damage that causes skin cancer cannot be reversed once it is there. The American government has had to make recommendations from protecting people from the sun, because of how common skin cancer is getting. The government recommends wearing a sunscreen with an SPF of at least 15 to your ears, scalp, lips, neck, tops of feet, and nose. That means that people will be safe from sun exposure 15 times more than they would be without sunscreen. They also recommend wearing a wide-‐brimmed hat and sunglasses to further protect sun exposure to your face and to prevent sun exposure to your eyes. Most people want to protect themselves from the sun based on the government recommendations. People use sunscreen, sunglasses, and hats to protect themselves because the government recommends that amount. Additionally, people also wear clothing that covers the spots of skin that are more exposed to the sun. Based on the information provided above, my group and I decided to experiment on whether the different consistencies of the same brand and SPF of a sunscreen can change the sun absorption. Question: Does changing the form of a sunscreen, cream or spray, affect the effectiveness of the sunscreen’s ability to block UV rays? Hypothesis: I hypothesize that the different form of a sunscreen will affect the effectiveness of the sunscreen’s ability to block UV rays. Materials: Spray Sunscreen Cream Sunscreen 3 Petri Dishes UV Beads
Fox, Racquel
Thursday, October 30, 2014 at 2:36:18 PM Pacific Daylight Time
70:56:81:a9:79:5d
Racquel Fox October 24, 2014 Science 5˚ UV BEAD LAB
Procedures: To start our experiment, we first had to get three petri dishes in order to control the spray sunscreen, lotion sunscreen, and no sunscreen at all. We put an equal amount of UV beads into the three petri dishes. After that, we sprayed sunscreen on all sides of the petri dish so no part of the dish was open to the sun. We then did that with the lotion sunscreen. Then, we timed the petri dishes for 5 minutes in a spot where the UV rays were definitely hitting the beads. At the end of the experiment, we saw which petri dish (spray sunscreen, lotion sunscreen, or no sunscreen) had the darkest UV beads. 1. Get 3 closed petri dishes 2. Get a handful of UV beads (enough to evenly space into 3 petri dishes) 3. Spray sunscreen on petri dish, cover all of the petri dish 4. Lotion sunscreen on one petri dish, cover all of the petri dish 5. Leave one petri dish clean of sunscreen 6. Bring all three petri dishes outside 7. Time the petri dishes for 5 minutes to see which ones change color faster 8. Take observations throughout the experiment The variables we needed to control were the sunscreen brand, SPF, sunscreen consistency, the amount of sunscreen, the amount of UV beads tested, and the weather. There were many different choices we could’ve used for each of these variables, so we had to find a way to control them. The independent variable we changed is the type of sunscreen being tested. Our dependent was the color change of the UV beads. The darker the color of the beads, the more UV rays were absorbed. We were testing the amount of UV rays that were absorbed into the UV beads with the different types of sunscreen. We contained UV beads in a closed petri dish, then covered the petri dishes, one in spray sunscreen, cream sunscreen, and one without to see how fast the UV rays affected the UV beads. We controlled the consistency of the sunscreen used, spray and cream. We lathered the sunscreen so that no light could get through the petri dish. To conduct tests accurately, a control group is necessary. As our control group, we put 5 UV beads in the dish, covered it, yet put no sunscreen on it. This was then put outside with the 2 other groups, all with the same exposure to the sun. We used this unprotected group as a comparison to the
Fox, Racquel
Thursday, October 30, 2014 at 2:36:18 PM Pacific Daylight Time
70:56:81:a9:79:5d
Racquel Fox October 24, 2014 Science 5˚ UV BEAD LAB sunscreen-‐coated groups, to see how much less UV was being absorbed by the protected beads. We didn’t want UV rays to come through the sides of the containers, and be absorbed by the beads with no resistance. Therefore, we coated the sides with the sunscreens we tested. This made sure that our tests were accurate, as all UV rays had to go through the same amount of resistance. Data: before experiment day set up data tables for recording your data Control Spray Cream 1 5
1
1
2 6
3
2
3 6
3
4
4 6
3
4
5 6
3
4
Graph:
Shade (1=Lightest)!
Testing the Effectiveness of Different Forms of Sunscreen! 6 5 4 3
Control
2
Spray
1
Cream
0 1
2
3
4
5
Time (min)! Analyze and Conclude (break out into paragraphs that are clear)
Fox, Racquel
Thursday, October 30, 2014 at 2:36:18 PM Pacific Daylight Time
70:56:81:a9:79:5d
Racquel Fox October 24, 2014 Science 5˚ UV BEAD LAB
This lab was an experiment, which showed whether the consistency of a sunscreen of the same brand and SPF affected the effectiveness of the UV absorption. We had to generate an experiment that proved our hypothesis to be either true or false. I hypothesized that the different form of a sunscreen would affect the effectiveness of the sunscreen’s ability to block UV rays. After experimenting for five minutes the effectiveness of a sunscreen’s ability to block UV rays, I found that the first petri dish (spray sunscreen) was a 3 on the scale of UV absorption 1-‐6, the second petri dish (lotion sunscreen) was a 4 on the scale of UV absorption 1-‐6, and the third petri dish (no sunscreen) was a 6 on the scale of UV absorption 1-‐6. My graph shows how the hue of the UV beads changed per minute. Since the results of the experiment showed that spray sunscreen had a lower shade than the lotion, the graph ed my hypothesis, that the different form of a sunscreen would affect the effectiveness of the sunscreen’s ability to block UV rays. We found that spray sunscreen tends to block sun exposure more than lotion sunscreen. Meanwhile, on the FutureDerm website, (beauty company), they state that spray sunscreen is about half as effective as lotion sunscreen. Since we were experimenting on petri dishes, and not actual skin, it is definitely a possibility that our data could be flawed. The amount of spray sunscreen on a petri dish and lotion sunscreen on a petri dish could not have been proportional. According to the Women’s Health Magazine, “While the protective ingredients are the same in sprays and lotions, some evidence suggests you might not use as much of the spray as you do the lotion, making it less effective”(“Sunscreen Sprays, Lotions, or Sticks: Which is Best?”). Since two sources say the opposite of our results, I suppose that we put too much spray sunscreen on the petri dish, and not enough lotion sunscreen on the other petri dish. After experimenting with the UV absorption of wearing spray sunscreen, lotion sunscreen, or no sunscreen at all, I came to the conclusion that even if you choose spray over lotion, anything is better than no sunscreen at all. Without any sunscreen, a higher amount of the UV rays are absorbed into your skin, which is a great risk of skin cancer. Definitely reapply sunscreen throughout the day, especially at noon, to keep your skin from burning throughout the day. This lab brought new insights about whether or not sunscreen is necessary or not and if so, which type I should use; and I definitely ended the lab with new knowledge and a new understanding of skin protection. Bibliography: "Sunscreen Sprays, Lotions, or Sticks: Which Is Best?"Womenshealthmag.com. Web. 28 Oct. 2014.
Fox, Racquel
Thursday, October 30, 2014 at 2:36:18 PM Pacific Daylight Time
70:56:81:a9:79:5d
Racquel Fox October 24, 2014 Science 5˚ UV BEAD LAB "Is a Spray Sunscreen Really As Effective as a Lotion? -‐ FutureDerm."FutureDerm. Web. 28 Oct. 2014. "How Do I Protect Myself from UV Rays?" American Cancer Society. Web. 28 Oct. 2014. "UV RADIATION." Centers for Disease Control and Prevention. Centers for Disease Control and Prevention, 13 Aug. 2014. Web. 28 Oct. 2014. "UV Radiation | SunWise | US EPA." EPA. Environmental Protection Agency. Web. 26 Oct. 2014.
Fox, Racquel
Thursday, October 30, 2014 at 2:36:18 PM Pacific Daylight Time
70:56:81:a9:79:5d
Problem/Background: The sun releases energy through wavelengths, visible light, infrared radiation (heat), and ultraviolet, UV, radiation, which you cannot see or feel. Ultraviolet radiation is the shortest wavelength of the three kinds, but also has a higher energy than visible light. Exposure to UV rays can effect you positively or negatively, it depends on the ways in which you protect yourself from it. The amount of UV ray exposure we get from the sun depends on the time of day it is. If, in the morning and afternoon, your shadow is taller than you are, your UV exposure is most likely on the low side. If, during midday, your shadow is shorter than you are, you are definitely being exposed to higher levels of UV radiation. It is known that exposure to the type of UV ray, UVB, helps your skin produce a type of vitamin D, which is beneficial for your bones and muscles. However, even with a benefit for bones and muscles from UV rays, overexposure to UV rays is the leading cause of skin cancer. The skin damage that causes skin cancer cannot be reversed once it is there. The American government has had to make recommendations from protecting people from the sun, because of how common skin cancer is getting. The government recommends wearing a sunscreen with an SPF of at least 15 to your ears, scalp, lips, neck, tops of feet, and nose. That means that people will be safe from sun exposure 15 times more than they would be without sunscreen. They also recommend wearing a wide-‐brimmed hat and sunglasses to further protect sun exposure to your face and to prevent sun exposure to your eyes. Most people want to protect themselves from the sun based on the government recommendations. People use sunscreen, sunglasses, and hats to protect themselves because the government recommends that amount. Additionally, people also wear clothing that covers the spots of skin that are more exposed to the sun. Based on the information provided above, my group and I decided to experiment on whether the different consistencies of the same brand and SPF of a sunscreen can change the sun absorption. Question: Does changing the form of a sunscreen, cream or spray, affect the effectiveness of the sunscreen’s ability to block UV rays? Hypothesis: I hypothesize that the different form of a sunscreen will affect the effectiveness of the sunscreen’s ability to block UV rays. Materials: Spray Sunscreen Cream Sunscreen 3 Petri Dishes UV Beads
Fox, Racquel
Thursday, October 30, 2014 at 2:36:18 PM Pacific Daylight Time
70:56:81:a9:79:5d
Racquel Fox October 24, 2014 Science 5˚ UV BEAD LAB
Procedures: To start our experiment, we first had to get three petri dishes in order to control the spray sunscreen, lotion sunscreen, and no sunscreen at all. We put an equal amount of UV beads into the three petri dishes. After that, we sprayed sunscreen on all sides of the petri dish so no part of the dish was open to the sun. We then did that with the lotion sunscreen. Then, we timed the petri dishes for 5 minutes in a spot where the UV rays were definitely hitting the beads. At the end of the experiment, we saw which petri dish (spray sunscreen, lotion sunscreen, or no sunscreen) had the darkest UV beads. 1. Get 3 closed petri dishes 2. Get a handful of UV beads (enough to evenly space into 3 petri dishes) 3. Spray sunscreen on petri dish, cover all of the petri dish 4. Lotion sunscreen on one petri dish, cover all of the petri dish 5. Leave one petri dish clean of sunscreen 6. Bring all three petri dishes outside 7. Time the petri dishes for 5 minutes to see which ones change color faster 8. Take observations throughout the experiment The variables we needed to control were the sunscreen brand, SPF, sunscreen consistency, the amount of sunscreen, the amount of UV beads tested, and the weather. There were many different choices we could’ve used for each of these variables, so we had to find a way to control them. The independent variable we changed is the type of sunscreen being tested. Our dependent was the color change of the UV beads. The darker the color of the beads, the more UV rays were absorbed. We were testing the amount of UV rays that were absorbed into the UV beads with the different types of sunscreen. We contained UV beads in a closed petri dish, then covered the petri dishes, one in spray sunscreen, cream sunscreen, and one without to see how fast the UV rays affected the UV beads. We controlled the consistency of the sunscreen used, spray and cream. We lathered the sunscreen so that no light could get through the petri dish. To conduct tests accurately, a control group is necessary. As our control group, we put 5 UV beads in the dish, covered it, yet put no sunscreen on it. This was then put outside with the 2 other groups, all with the same exposure to the sun. We used this unprotected group as a comparison to the
Fox, Racquel
Thursday, October 30, 2014 at 2:36:18 PM Pacific Daylight Time
70:56:81:a9:79:5d
Racquel Fox October 24, 2014 Science 5˚ UV BEAD LAB sunscreen-‐coated groups, to see how much less UV was being absorbed by the protected beads. We didn’t want UV rays to come through the sides of the containers, and be absorbed by the beads with no resistance. Therefore, we coated the sides with the sunscreens we tested. This made sure that our tests were accurate, as all UV rays had to go through the same amount of resistance. Data: before experiment day set up data tables for recording your data Control Spray Cream 1 5
1
1
2 6
3
2
3 6
3
4
4 6
3
4
5 6
3
4
Graph:
Shade (1=Lightest)!
Testing the Effectiveness of Different Forms of Sunscreen! 6 5 4 3
Control
2
Spray
1
Cream
0 1
2
3
4
5
Time (min)! Analyze and Conclude (break out into paragraphs that are clear)
Fox, Racquel
Thursday, October 30, 2014 at 2:36:18 PM Pacific Daylight Time
70:56:81:a9:79:5d
Racquel Fox October 24, 2014 Science 5˚ UV BEAD LAB
This lab was an experiment, which showed whether the consistency of a sunscreen of the same brand and SPF affected the effectiveness of the UV absorption. We had to generate an experiment that proved our hypothesis to be either true or false. I hypothesized that the different form of a sunscreen would affect the effectiveness of the sunscreen’s ability to block UV rays. After experimenting for five minutes the effectiveness of a sunscreen’s ability to block UV rays, I found that the first petri dish (spray sunscreen) was a 3 on the scale of UV absorption 1-‐6, the second petri dish (lotion sunscreen) was a 4 on the scale of UV absorption 1-‐6, and the third petri dish (no sunscreen) was a 6 on the scale of UV absorption 1-‐6. My graph shows how the hue of the UV beads changed per minute. Since the results of the experiment showed that spray sunscreen had a lower shade than the lotion, the graph ed my hypothesis, that the different form of a sunscreen would affect the effectiveness of the sunscreen’s ability to block UV rays. We found that spray sunscreen tends to block sun exposure more than lotion sunscreen. Meanwhile, on the FutureDerm website, (beauty company), they state that spray sunscreen is about half as effective as lotion sunscreen. Since we were experimenting on petri dishes, and not actual skin, it is definitely a possibility that our data could be flawed. The amount of spray sunscreen on a petri dish and lotion sunscreen on a petri dish could not have been proportional. According to the Women’s Health Magazine, “While the protective ingredients are the same in sprays and lotions, some evidence suggests you might not use as much of the spray as you do the lotion, making it less effective”(“Sunscreen Sprays, Lotions, or Sticks: Which is Best?”). Since two sources say the opposite of our results, I suppose that we put too much spray sunscreen on the petri dish, and not enough lotion sunscreen on the other petri dish. After experimenting with the UV absorption of wearing spray sunscreen, lotion sunscreen, or no sunscreen at all, I came to the conclusion that even if you choose spray over lotion, anything is better than no sunscreen at all. Without any sunscreen, a higher amount of the UV rays are absorbed into your skin, which is a great risk of skin cancer. Definitely reapply sunscreen throughout the day, especially at noon, to keep your skin from burning throughout the day. This lab brought new insights about whether or not sunscreen is necessary or not and if so, which type I should use; and I definitely ended the lab with new knowledge and a new understanding of skin protection. Bibliography: "Sunscreen Sprays, Lotions, or Sticks: Which Is Best?"Womenshealthmag.com. Web. 28 Oct. 2014.
Fox, Racquel
Thursday, October 30, 2014 at 2:36:18 PM Pacific Daylight Time
70:56:81:a9:79:5d
Racquel Fox October 24, 2014 Science 5˚ UV BEAD LAB "Is a Spray Sunscreen Really As Effective as a Lotion? -‐ FutureDerm."FutureDerm. Web. 28 Oct. 2014. "How Do I Protect Myself from UV Rays?" American Cancer Society. Web. 28 Oct. 2014. "UV RADIATION." Centers for Disease Control and Prevention. Centers for Disease Control and Prevention, 13 Aug. 2014. Web. 28 Oct. 2014. "UV Radiation | SunWise | US EPA." EPA. Environmental Protection Agency. Web. 26 Oct. 2014.
Fox, Racquel
Thursday, October 30, 2014 at 2:36:18 PM Pacific Daylight Time
70:56:81:a9:79:5d
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