click below
click below
Normal Size Small Size show me how
AQA Heat 1
Beginners - G - E
Term | Definition |
---|---|
condensation | when a gas turns into a liquid and looses some energy |
evaporation | when a liquid turns into a gas and then takes heat energy away from the liquid |
conduction | heat moves through a solid by passing on vibrations, like when a metal gets hot |
convection current | this happens in air or in liquid, the hot particles move up and the cold particles sink down |
infrared radiation | this happens when hot things give off heat in waves, you don't have to touch it to feel warm |
conductor | lets heat pass through it easily |
insulator | does not let heat in or out easily |
more dense | lots of particles in a space |
less dense | few particles in a space |
emit | to give out |
black surfaces | good at taking heat in and giving it out |
white and shiny surfaces | bad at taking heat in and giving it out |
absorb | to take in heat |
solid | particles are packed very close together and vibrate |
liquid | particles are touching but can move about and flow over each other easily |
gas | particles are very spread out and move around very quickly |
kinetic energy | movement energy |
thermometer | the piece of equipment that we measure temperature with |
contract | to take up less space |
expand | to take up more space |
thermal | another word for heat |
fluid | liquid or a gas |
cavity wall insulation | is put in between the gaps in walls of houses to keep the house warm in winter and cool in summer |
U-value | is how quickly parts of a building loose heat |
Solar panels | absorb heat (infrared radiation) from the Sun to warm up water |
mass | is measured in kilograms (kg) |
energy | is measured in Joules (J) |