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 is transferred by three methods

Answer 3

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 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 7

Conductor

Answer 7

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

Question 8

Insulator

Answer 8

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

Experiment btw

Answer 9

Ball and ring apparatus

Question 10

Water

Answer 10

Water begins to expand when cooled before 4 degrees Celsius

Question 11

Winds are formed by convection?

Answer 11

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 12

Temperature

Answer 12

A measure how hot an object is

Question 13

What is the temperature of the sun?

Answer 13

600 degrees Celsius

Question 14

Thermometer

Answer 14

Heat measurer.
The liquid in the thermometer will expand and rise when heated and will contract and fall when cooled.
It is measured between 0 and 100 degrees Celsius

Question 15

Boiling point of water

Answer 15

100°C

Question 16

Freezing point of water

Answer 16

0° C

Question 17

Melting point

Answer 17

Is when a solid turns to a liquid

Question 18

Boiling point

Answer 18

Is when a liquid turns to a gas

Question 19

Freezing point

Answer 19

Is when a liquid turns to a solid

Question 20

Condensation

Answer 20

Is a gas turning to a liquid

Question 21

Evaporation

Answer 21

When a liquid turns to a gas

Question 22

Pressure and boiling point

Answer 22

A kettle will normally boil at 100°C
But will boil at 70°C on top of Mt.Everest
Atmospheric pressure is less so it is easier for the water vapour to escape!

Question 23

Latent heat

Answer 23

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

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 or 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

Measured

Answer 27

In a joule

Question 28

Dull, black surface radiates

Answer 28

Absorbs heat better than a shiny surface

Question 29

When a water a 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