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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
Note 
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