Focus On California Physical Science Vocabulary Chap 5-8

Front 1

physical property

Back 1

characteristic of a substance that can be observed without changing the substance (temperature, etc.)

Front 2

chemical property

Back 2

characteristic of a substance that describes it’s ability to change into other substances (to observe, must change)

Front 3

physical change

Back 3

changes form or appearance but doesn’t change substance into something else

Front 4

chemical change

Back 4

atoms are rearranged to form new substances, chemical bonds break and new bonds form

Front 5

reactants

Back 5

chemicals that undergo a chemical change

Front 6

products

Back 6

the chemicals created by reactants

Front 7

precipitate

Back 7

solid that forms from solution during a chemical reaction

Front 8

endothermic reaction

Back 8

a reaction that absorbs energy (gets cold)

Front 9

exothermic reaction

Back 9

a reaction that releases energy (gets hotter)

Front 10

chemical equation

Back 10

an equation that shows a chemical reaction using symbols (like Na, C, H20)

Front 11

conservation of matter

Back 11

matter canNOT enter and escape from the reaction (bell jar)

coefficient a number placed in front of a chemical formula to tell you the relative amount of a reactant or product used in the reaction