Heat

Question 0

What happens when we heat a solid, liquid or gas

Answer 0

It expands

Question 1

Heat

Answer 1

Is a form of energy

Question 2

What happens when we cool a solid, liquid or gas

Answer 2

It contracts

Question 3

Heat transfer

Answer 3

Heat is transferred by three methods: convection, conduction, radiation

Question 4

Conduction

Answer 4

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

Question 5

Convection

Answer 5

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

Question 6

Radiation

Answer 6

Heat travels from a medium, does not need a solid, liquid or gas to go through, will flow through a vacuum

Question 7

Conductor

Answer 7

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

Question 8

Insulator

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 expands when Heated and contracts when cooled.

Answer 9

Ball and ring apparatus

Question 10

Water

Answer 10

Water begins to expand when cooled below 4 degrees Celcius

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

Question 13

Boiling point of water

Answer 13

100° C

Question 14

Freezing point of water

Answer 14

0° C

Question 15

Melting point

Answer 15

Is when a solid turns to a liquid

Question 16

Boiling point

Answer 16

Is when a liquid turns to a gas

Question 17

Freezing point

Answer 17

Is when a liquid turns to solid

Question 18

Condensation

Answer 18

Is a gas turning to a liquid

Question 19

Evaporation

Answer 19

Is when a liquid turns to a gas

Question 20

Pressure § Boiling point

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

Answer 20

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

Question 21

Laten heat

Answer 21

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

Question 22

Latent heat of fusion

Answer 22

Is used when a solid changes into a liquid

Question 23

Latent heat of vaporisation

Answer 23

Is used when a liquid changes to a gas

Question 24

Dull black surface radiates

Answer 24

Heat better than a shiny surface

Question 25

Dull black surface absorb

Answer 25

Heat better than a shiny surface

Question 26

When water is below 4°

Answer 26

It begins to expand

Question 27

The amount of heat in a substance depends on

Answer 27

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