Heat Flashcards

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0
Q

What happens when we heat a solid liquid or gas

A

It expands

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1
Q

Heat

A

Is a form of energy

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2
Q

What happens when we cool a solid liquid or gas

A

It contracts

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3
Q

Heat transfer

A
  • Convection
  • Conduction
  • Radiation
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4
Q

Conduction

A

Heat travels from particles to particles along a substance, normally solid

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5
Q

Convection

A

Heat travels through a fluid ( liquid or a gas ) when the particles move and carry the Heat

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6
Q

Radiation

A

Heat travels from a hot object without the need for medium, does not need solid, liquid or gas to go through, will flow through a vacuum

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7
Q

Conductor

A

Something that allows energy e.g Heat to flow through it e.g metal is a good conductor

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8
Q

Insulator

A

An insulator is a substance that doesn’t allow heat to flow through it easily e.g plastic

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9
Q

To show that a solid expands when Heated and contract when cooled

A

Ball and ring apparatus

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10
Q

Air

A

Is a good insulator keeps animals warm is trapped by the fur and help to insulate the animal

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11
Q

Layers

A

The hairs on our arms are not very good at keeping us warm if we wear layers of clothes air is trapped to keep us warm.

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12
Q

Winds are formed by convection

A

The sun heats the earth
This cause hot air to rise
As the hot air rises it cools and then sinks down to the ground

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13
Q

Temperature

A

A measure how hot an object is

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14
Q

Thermometer

A

The liquid in the thermometer will expand and rise when heated and will contract and fall when cooled

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15
Q

Boiling point of water

A

100°C

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16
Q

Freezing point of water

A

0°C

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17
Q

Melting point

A

Is when a solid turns to a liquid

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18
Q

Boiling point

A

Is when a liquid turns to a gas

19
Q

Freezing point

A

Is when a liquid turns to a solid

20
Q

Condensation

A

Is a gas turning to a liquid

21
Q

Evaporation

A

Is when a liquid turns to a gas

22
Q

Pressure and boiling point

A kettle will normally boil at 100°C but will boil at 70°C on top of Mt.Everest.

A

Atmospheric pressure is less so it is easier for the water vapour to escape.

23
Q

Latent heat

A

The heat taken in or given out when a substance is changing state without change in temperature

24
Q

Latent heat of fusion

A

Is used when a solid changes into a liquid

25
Q

Latent heat of vaporisation

A

Is used when a liquid changes to a gas

26
Q

Dull, black surface radiates

A

Heat better than a shinny surface

27
Q

Dull, black surface absorb

A

Heat better than a skinny surface

28
Q

When water is below 4°

A

It begins to expand

29
Q

The amount of heat in a substance depends on

A

Temperature mass and what it is made of e.g 200ml of water at 60°C has twice as much heat as 100ml of water at 60°C

30
Q

Boiling point of water

A

100°C

31
Q

Freezing point of water

A

0°C

32
Q

Melting point

A

Is when a solid turns to a liquid

33
Q

Boiling point

A

Is when a liquid turns to a gas

34
Q

Freezing point

A

Is when a liquid turns to a solid

35
Q

Condensation

A

Is a gas turning to a liquid

36
Q

Evaporation

A

Is when a liquid turns to a gas

37
Q

Pressure and boiling point

A kettle will normally boil at 100°C but will boil at 70°C on top of Mt.Everest.

A

Atmospheric pressure is less so it is easier for the water vapour to escape.

38
Q

Latent heat

A

The heat taken in or given out when a substance is changing state without change in temperature

39
Q

Latent heat of fusion

A

Is used when a solid changes into a liquid

40
Q

Latent heat of vaporisation

A

Is used when a liquid changes to a gas

41
Q

Dull, black surface radiates

A

Heat better than a shinny surface

42
Q

Dull, black surface absorb

A

Heat better than a skinny surface

43
Q

When water is below 4°

A

It begins to expand

44
Q

The amount of heat in a substance depends on

A

Temperature mass and what it is made of e.g 200ml of water at 60°C has twice as much heat as 100ml of water at 60°C