Heat

Question 0

What happens when we heat a solid liquid or gas?

Answer 0

It expands

Question 1

Heat is a form of:

Answer 1

Is a form of energy

Question 2

What happens when we heat a solid liquid or gas?

Answer 2

It contracts

Question 3

Heat transfer

Answer 3

Convection
Conduction
Radiation

Question 4

Conduction

Answer 4

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

Question 5

Conductor

Answer 5

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

Question 6

Convection

Answer 6

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

Question 7

Radiation

Answer 7

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

Question 8

Insulators

Answer 8

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

Question 9

To show that a solid expand s when heated and contracts when cooled

Answer 9

Ball and ring apparatus

Question 10

Water

Answer 10

Water begins to cool below 4 degrees

Question 11

Air

Answer 11

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

Question 12

Layers

Answer 12

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

Question 13

Winds are formed by convection

Answer 13

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

Question 14

Temperature

Answer 14

A measure of how hot an object is

Question 15

Thermometer

Answer 15

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

Question 16

Boiling point of water

Answer 16

100°C

Question 17

Freezing point of water

Answer 17

0°C

Question 18

Melting point

Answer 18

Is when a solid turns to a liquid

Question 19

Boiling point

Answer 19

When a liquid turns into a gas

Question 20

Freezing point

Answer 20

When a liquid turns into a solid

Question 21

Condensation

Answer 21

Is a gas turning to a liquid

Question 22

Evaporation

Answer 22

Is when a liquid turns into a gas

Question 23

Pressure and boiling point

A kettle will Boil at 100°C but will boil at 70°C on top of Mount Everest

Answer 23

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

Question 24

Latent heat

Answer 24

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

Question 25

Latent heat of fusion

Answer 25

Is used when a solid changes into a liquid

Question 26

Latent heat of vaporisation

Answer 26

Is used when a liquid changes to a gas

Question 27

Dull black surface radiates

Answer 27

Heat better than a shiny surface

Question 28

Dull black surface absorb

Answer 28

Heat better than a shiny surface

Question 29

When water is below 4°C

Answer 29

It begins to expand

Question 30

The amount of heat in a substance depends on

Answer 30

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