Heat

Question 0

What happens when we heat a solid, liquid or gas ?

Answer 0

It expands

Question 1

What is Heat ?

Answer 1

Heat is a form of energy

Question 2

What happens when we cool a solid, liquid or gas?

Answer 2

It contracts

Question 3

Conductor

Answer 3

Something that allows energy to flow through it

Question 4

Insulator

Answer 4

A substance that doesn’t allow heat to flow through it

Question 5

To show that a solid expands when we heated and contracts when cooled

Answer 5

Ball and ring apparatus

Question 6

Water

Answer 6

Water begins to expand when cooled below 4 degrees Celsius

Question 7

Winds are formed by convection

Answer 7

The sun heats the earth this causes hot air to rise, as the hot air rises it cools and then sinks down to the ground

Question 8

Radiation

Answer 8

Radiation is the transfer of heat from a hot object without the need of a medium

Question 9

Temperature

Answer 9

A measure of how hot an object is

Question 10

Thermometer

Answer 10

The liquid in the thermometer will expand and rise when heated and will contract and fall when cooled it is measure between 0 and 100 degrees Celsius

Question 11

Boiling point of water

Answer 11

100° Celsius

Question 12

Freezing point of water

Answer 12

0° Celsius

Question 13

Melting point

Answer 13

When a solid turns to a liquid

Question 14

Boiling point

Answer 14

When a liquid turns to a gas

Question 15

Freezing point

Answer 15

When a liquid turns to a solid

Question 16

Condensation

Answer 16

A gas turning to a liquid

Question 17

Evaporation

Answer 17

When a liquid turns to a gas

Question 18

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

Answer 18

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

Question 19

Latent heat

Answer 19

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

Question 20

Latent heat of fusion

Answer 20

Used when a solid changes into a liquid

Question 21

Latent heat of vaporisation

Answer 21

Used when a liquid changes into a gas

Question 22

Convection

Answer 22

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

Question 23

Dull, black surface radiates

Answer 23

Heat better than a shiny surface

Question 24

Dull, black surfaces absorb

Answer 24

Heat better than a shiny surface

Question 25

When water is below 4°

Answer 25

It begins to expand

Question 26

The amount of Heat in a substance depends on

Answer 26

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°