Heat Flashcards
What happens when we heat a solid liquid or gas
It expands
Heat
Is a form of energy
What happens when we cool a solid liquid or gas
It contracts
Heat transfer
- Convection
- Conduction
- Radiation
Conduction
Heat travels from particles to particles along a substance, normally solid
Convection
Heat travels through a fluid ( liquid or a gas ) when the particles move and carry the Heat
Radiation
Heat travels from a hot object without the need for medium, does not need solid, liquid or gas to go through, will flow through a vacuum
Conductor
Something that allows energy e.g Heat to flow through it e.g metal is a good conductor
Insulator
An insulator is a substance that doesn’t allow heat to flow through it easily e.g plastic
To show that a solid expands when Heated and contract when cooled
Ball and ring apparatus
Air
Is a good insulator keeps animals warm is trapped by the fur and help to insulate the animal
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.
Winds are formed by convection
The sun heats the earth
This cause hot air to rise
As the hot air rises it cools and then sinks down to the ground
Temperature
A measure how hot an object is
Thermometer
The liquid in the thermometer will expand and rise when heated and will contract and fall when cooled
Boiling point of water
100°C
Freezing point of water
0°C
Melting point
Is when a solid turns to a liquid