Physical Science World list chapter 5

Question 1

matter

Answer 1

Anything that has mass and occupies space

Question 2

Chemical Property

Answer 2

Ability to change to a different substance

Question 3

Precipitate

Answer 3

A solid that forms from a solution during a chemical reaction

Question 4

Enzyme

Answer 4

A biological catalyst that lowers activation energy

Question 5

Endo-Exothermic reactions

Answer 5

Endo: Energy taking in Exo: Energy given out (In a reaction)

Question 6

Activation Energy

Answer 6

Energy required to start a reaction

Question 7

Reactant

Answer 7

A substance that enters into a chemical reaction

Question 8

Product

Answer 8

Result of a Chemical Reaction

Question 9

Conservation of mass

Answer 9

Matter is not created or destroyed during a chemical reaction

Question 10

Coefficient

Answer 10

A number in front of a chemical formula that indicates hiw many molecules or atoms of each reactant and produce are involved in a reaction

Question 11

Synthesis

Answer 11

Chemical reaction were things combine

Question 12

decomposition

Answer 12

opposite of synthesis

Question 13

replacement

Answer 13

one element replaces another or 2 elements trade places

Question 14

catalyst

Answer 14

lowers activation energy

Question 15

inhibitor

Answer 15

decreases the rate of reaction