8thgrade 2

Question 1

chemical reaction

Answer 1

one or more substances go together and make more.

Question 2

precipitate

Answer 2

a solid that is produced as a result of a chemical reaction in solution

Question 3

chemical formula

Answer 3

a combination of chemical symbols and numbers to represent a substance

Question 4

chemical equation

Answer 4

representation of a chemical reaction

Question 5

reactant

Answer 5

can it react/ chemical reaction

Question 6

product

Answer 6

a substance that forms a chemical reactkionm

Question 7

law of conversation of mass

Answer 7

the law that states mass cannot be destroyed in ordinary chemical and physical changes

Question 8

synthesis reation

Answer 8

2 or more substances combined to form a new compound

Question 9

decomposition reaction

Answer 9

single compound brakes down to form 2 or more simpler substances

Question 10

single displacement reation

Answer 10

a reaction in which one element or radical takes the place of another element or radical in a compound

Question 11

double displacement reaction

Answer 11

gas or solid precipitate or a molecular compound forms from the exchange of ions between 2 compounds

Question 12

exothermic reactiom

Answer 12

exits or gives off

Question 13

endothermic reaction

Answer 13

a chemical reaction that requires heat

Question 14

law of conversation of energy

Answer 14

energy cannot be created nor destroys but can be changed from one form to anoher

Question 15

activation energy

Answer 15

the minimum amount of energy required to start a chemical reaction

Question 16

inhibator

Answer 16

slows down a chemical reaction

Question 17

catalyst

Answer 17

speeds up a chemical reaction