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7th Grade Chapter 20 Key Terms

Glencoe Level Green

AB
chemical changethe composition of the substance changes
condensationgas changes into a liquid
depositiongas changes into a solid
dissolveto create a solution where the particles of a substance spread out in the liquid
Law of Conservation of Massthe total mass of the matter is the same before and after a physical or chemical change
physical changewhen the form or appearance of matter changes, but not its composition (shape, state)
precipitatea solid formed from a chemical change
sublimationsolid changes directly into a gas
vaporizationliquid becomes a gas


Ada Public Schools

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