Heat

Question 1

Solid, liquids and gases expand

Answer 1

When heated

Question 2

Solids, liquids and gases contract

Answer 2

When cooled

Question 3

Heat

Answer 3

Heat is a form of energy

Question 4

Water

Answer 4

Water begins to expand when cooled below 4 degrees celsius

Question 5

Bimetallic strip

Answer 5

Shows that not all metals expand at the same rate change e.g. Thermostats in heating or an iron

Question 6

Convection

Answer 6

Heat travels through a fluid ( liquid or a 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

Conduction

Answer 8

Is the method by which heat travels from particle to particle through a solid

Question 9

Conductor

Answer 9

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

Question 10

Insulator

Answer 10

Is a substance that doesn’t allow heat to flow through it easily e.g. Plastic

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 very good at keeping us warm, if we wear layers of clothes, air is trapped to keep us warm

Question 13

Temperature

Answer 13

A measure how hot an object is

Question 14

Temperature is measured

Answer 14

With a thermometer

Question 15

We have 2 types of thermometers

Answer 15

Mercury and alcohol thermometers

Question 16

Melting point

Answer 16

Is when a solid turns to a liquid

Question 17

Boiling point

Answer 17

Is when a liquid turns to a gas

Question 18

Freezing point

Answer 18

Is when a liquid turns to a solid

Question 19

Condensation

Answer 19

Is a gas turning to a liquid

Question 20

Latent heat

Answer 20

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

Question 21

Latent heat of fusion

Answer 21

Is used when a solid changes into a liquid

Question 22

Latent heat of vaporisation

Answer 22

Is used when a liquid changes to a gas

Question 23

Radiation can

Answer 23

A dull, black surface radiates and absorbs heat better than a shiny silver surface

Question 24

Low pressure

Answer 24

Lowers the boiling point

Question 25

High pressure

Answer 25

Raises the boiling point