GCSE AQA Particle Module

Density

Measure of how much stuff is in a given volume

Solid

Close packed regular arrangement of particles

Liquid

Densely packed particles that move past each other with random motion

Melting

Solid heated up into a liquid

Boiling/Evaporating

Liquid heating up into a gas

Condensation

Gas condenses to a liquid

Freezing

Liquid freezes to a solid

Sublimation

Solid turns directly to a gas

Physical change

Reversible change in state without chemical reactions

Internal energy

Total kinetic and potential energy of particles in a system

Specific heat capacity

Energy needed to raise the temperature of one kg of a substance by one degree Celsius

Specific Latent Heat

Energy needed to change the state of one kg of a substance with no temperature change