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Heating and Cooling

Year 8 Heating and Cooling

The units for measuring temperature. degrees Celsius (°C)
A form of energy, measured in joules. heat energy
The units for measuring energy. joules (J)
How hot something is, measured in °C. temperature
Another name for heat energy. thermal energy
The way heat travels through solids. conduction
A material which lets energy flow through it easily. conductor
A material which does not let energy flow through it easily. insulator
To take in energy. absorb
Get smaller. contract
The transfer of heat in fluids. convection
A current created by heat causing changes in the density of a fluid. convection current
To give out energy. emit
Get bigger. expand
A gas or a liquid. fluid
A type of wave in the electromagnetic spectrum. It can travel through transparent things and a vacuum (empty space). infrared radiation
Any substance. medium
The force caused by particles hitting a certain area. pressure
The transfer of heat energy by electromagnetic waves. radiation
A material that does not let heat energy flow through it easily. heat insulator
When a liquid is at its point it is as hot as it can get. It is evaporating as fast as it can. boiling point
When a gas turns into a liquid. condense
When a liquid turns into a gas. evaporate
Something made of particles that are very spread out and not attached to each other. A gas does not have a fixed shape or volume and is easy to squash. gas
The hotter something is, the more of this type of energy it has. heat energy
Something made of particles that are fairly close together, but attached weakly so that they can move past each other. It has a fixed volume but not a fixed shape. liquid
When a solid turns into a liquid. melt
Something made of particles that are very close together and attached so that they cannot move past each other. It has a fixed shape and volume. solid
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