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Flashcards in Heat Deck (36):
1

Solids , liquids and gases expand

When heated

2

Solids , liquids and gases crontract

When cooled

3

What is the unit of energy

The unit of energy is the Joule

4

Heat is a form of energy

Heat moves mountain lava

5

Bimetallic strip

The bimetallic strip shows that not all metals expand at the same rate , change e.g. Thermostats in heating or an iron

6

Water

Water begins to expand when cooled below 4 degrees celsius

7

Conduction

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

8

Convection

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

9

Radiation

Wheat 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

10

Conduction

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

11

Conductor

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

12

Insulator

Insulator is a substance that doesn't allow heat to flow through it easily e.g plastic

13

Air

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

14

Layers

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

15

Radiation

All heat object radiate heat . The hotter the object the more heat it radiates

16

Tempature

A measure how hot an object is

17

Temperature is measured

With a thermometer

18

Mercury and alcohol thermometer

We deal with two types of themometers

19

The liquid in the thermometer will...

Expand and rise when heated and will contract and fall when cooled

20

Melting point

Melting point is when a solid turns to a liquid

21

Boiling point

Boiling point is when a liquid turns to a gas

22

Freezing point

Freezing point is when a liquid turns to a solid

23

Condensation

Condensation is a gas turning to a liquid

24

Latent heat

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

25

Latent heat of fuision

Is used when a solid changes into a liquid

26

Latent heat of vaporisation

Is used when liquid changes to a gas

27

Melting point

Melting point is when a solid turns to a liquid

28

Boiling point

Boiling point is when a liquid turns to a gas

29

Freezing point

Freezing point is when a liquid turns to a solid

30

Condensation

Condensation is a gas turning to a liquid

31

Latent heat

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

32

Latent heat of fuision

Is used when a solid changes into a liquid

33

Latent heat of vaporisation

Is used when liquid changes to a gas

34

Radiation can ...

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

35

Low pressure

Lowers the boiling point

36

High pressure

Raises the boiling point .