Vocabulary #9

1. physical change:  a change in size, shape, or state, without forming a new subtance.
2. chemical change: a change in matter that produces a new subtance with different properties from the original.
3. chemical reaction: a chemical change of original subtances into one or more new subtances.
4. reactant: one of the original subtances before a chemical reaction takes place.
5. product: one of the new subtances produces when a chemical reaction takes place.