Sample Heat Mind Map 676v48

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Mind Maps For Secondary Science : Volume 1 Wood

Also called poor conductor

b Substance that allows heat to move through slowly Aluminium

a

1

HEAT INSULATOR

c

Glass 2

7

Plastic

3

Examples 5

6

1

Rubber

hot

cold

a

d

Becomes cold very fast Becomes hot very fast

c

Metals

2

HEAT CONDUCTOR

b

HEAT FLOW HEAT CONDUCTORS AND INSULATORS

1 a

Substance that allows heat to move through easily Air conditioner placed near ceiling

Warm air rises

b

Depends on material

Examples Copper 1

High conduction rate

Good conductors

2

Polystyrene

Asbestos

2

From a hot object to cold object

4

Cork

3

Iron

Due to temperature difference

Heat travels from hot to cold end

Heat flow through solids

2

Conduction rate

b

a

Experiment

1

Hot air rises and escapes from top

b

Ventilation holes at roof

2

Colder air sinks

VOLUME 1 CHAPTER 7

1 3

Cold air enters heater

HEAT (2 - 4)

Convection current produced

Heat flow through fluids (liquids and gases)

G

HEAT FLOW TYPES

a

4

By circulatory movement of heated fluid.

a b

2

H

CONVECTION

c

Hot fluid moves upwards, cold fluid move downwards.

3

HEAT FLOW IN NATURAL PHENOMENA

d

1

e

SEA BREEZE

Forms convection current During Daytime

2

3

Cooler air flows towards land

Warm air 2 rises

2

RADIATION

3 Cold

air sinks

4

Experiments c

1

b

WARMING OF EARTH BY SUN

Land heats up faster

To switch

3

5

Land cools down faster

1

Sea warmer than land

2

Warm air rises

Heat flows in vacuum by radiation. 1

To vacuum pump

Purple stream of water move upwards, the downwards in circular motion.

hot air

Can flow through vacuum

Heat flow without medium

2

After 10 minutes, thermometer shows a rise in temperaure.

Potassium permanganate crystal

cold air 2

Convection current



Cooler air flows towards sea

Cool 4 air sinks

Smouldering incense stick

Experiment

RADIATION During Nighttime

a

1

LAND BREEZE

Vacuum (No conduction or convention)

C

Pin A falls first, then pin B followed by pin C.

a

Heat flows from hot end to cold end by conduction

4

c

BUILDINGS' COOLING/ HEATING SYSTEM

1

Cool air enters from windows near the ground

B A b

I

Heater placed near floor

Convection current produced

Low conduction rate

wax

F

Warm air rises

b

4

c

1

Cold air sinks

Non - Metals

3

CONDUCTION

2

3

Bad conductors : Insulators a

1

A convection current is formed in heated water and air.