science vocab

Question 1

Substance(s) present after a reaction

Answer 1

Product

Question 2

Number telling how many molecules of a substance are involved in a chemical reaction

Answer 2

Coefficient

Question 3

Uses symbols and formulas to show chemical reactions

Answer 3

Chemical equations

Question 4

Substances present before a reaction

Answer 4

Reactant

Question 5

A change in matter that produces new substances

Answer 5

chemical change

Question 6

A solid that forms from a solution during a chemical reaction

Answer 6

precipitate

Question 7

A reaction that absorbs energy in the form of heat

Answer 7

endothermic reaction

Question 8

A combination of symbols that shows the ratio of elements in a compound

Answer 8

Chemical Formula

Question 9

Number telling how many atoms are in a molecule or the ratio of elements in a compound

Answer 9

subscript

Question 10

A reaction that releases energy in the form of heat

Answer 10

Exothermic Reaction

Question 11

One or two letters are used to represent an element

Answer 11

Chemical Symbol

Question 12

Principle that states that matter is not created or destroyed during a chemical reaction

Answer 12

Law of Conservation of Mass

Question 13

Is a process in which substances undergo chemical change.

Answer 13

chemical reaction