Vocabulary: Chemical Changes

1. physical change =  a change in size, shape, or state, without forming a new substance .

2.chemical change= a change in matter that produces a new substances with  different properties from the original .

3.chemical reaction = a chemical change of original substances into one or more new subtances

4.reactant = one of the oiginal substances before a chemical reaction takes place .

5.product= one of the new subtances produced when a chemical  reaction takes place .