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1. 
A substance that increases the rate of a chemical reaction but is not consumed in the reaction.
A.
chemical reaction
B.
catalyst
C.
product
D.
reactant
2. 
affects the rate of a chemical reaction by changing the speed at which particles of reactants move.
A.
temperature
B.
chemical reaction
C.
decomposition
D.
synthesis
3. 
every chemical reaction forms at least one
A.
precipitate
B.
reactant
C.
product
D.
catalyst
4. 
changes the way in which atoms are arranged by causing bonds between atoms to break and new bonds to form between different atoms.
A.
synthesis
B.
precipitate
C.
decomposition
D.
chemical reaction
5. 
a reaction in which a more complex compound is formed from combination of simpler substances
A.
synthesis
B.
catalyst
C.
product
D.
decomposition
6. 
a substance present at the beginning of a chemical reaction that is chemically changed by the reaction
A.
product
B.
precipitate
C.
reactant
D.
chemical reaction
7. 
a solid product that sometimes forms when chemicals in liquids react
A.
catalyst
B.
temperature
C.
product
D.
precipitate
8. 
a reaction in which a substance breaks down into simpler substances
A.
chemical reaction
B.
synthesis
C.
decomposition
D.
reactant
9. 
identify four easily observed changes that may occur during a chemical reaction.
A.
precipitate and temperature change
B.
change in color and a production of gas
C.
disappearance and increased gravitational pull
D.
all of the above