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solids liquids & gas
key definitions
Term | Definition |
---|---|
matter | anything that occupies space and has mass |
solids | state of matter with a regular shape, fixed mass and fixed volume |
liquids | state of matter with irregular shape, fixed mass and fixed volume |
gas | state of matter with no regular shape, fixed mass but no fixed volume |
diffusion | spreading of particles to fill available space |
melting | changing of a solid to a liquid when heat is added |
evaporating | changing of a liquid to a gas when heat is added |
condensing | changing of a gas to a liquid when heat is taken away |
freezing | changing of a liquid to a solid when heat is taken away |
boiling | when evaporation is occurring throughout a liquid |
boiling point | temperature at which evaporation occurs throughout a liquid |