Chapter 6 Section 2

Question 1

Physical Change

Answer 1

Changes appearance of the substance but not its composition

Question 2

Chemical change

Answer 2

Any change that results in the formation of new chemical substances caused by the making or breaking of bonds between Atoms

Question 3

Reactant

Answer 3

Element or compound that enters into chemical reactions

Question 4

Products

Answer 4

Element or compound produced by a chemical reaction

Question 5

Coefficient

Answer 5

The numbers place before the reactants in the chemically equation so that the number of Atoms in the products on the right side of the equation or equal to the number of Atoms in the reactants on the left side

Question 6

Subscript

Answer 6

Number that is written below the element that lets you know how many molecules of the elements are present

Question 7

Arrow in chemical equation

Answer 7

Means yeild or make reacts to form

Question 8

Law of conservation of mass

Answer 8

Since matter can neither be created nor destroyed a chemical equation must balance

Question 9

Endothermic reaction

Answer 9

Reaction in which the system absorbs energy from its surroundings; usually in the form of heat

Question 10

Exothermic reaction

Answer 10

Chemical reaction that releases energy by light or heat

Question 11

Activation energy

Answer 11

Energy needed to get a reaction started

Question 12

Catalyst

Answer 12

Substance that speeds up the rate of a chemical reaction

Question 13

Enzyme

Answer 13

Protein that acts as a biological catalyst

Question 14

Active site

Answer 14

Specific place where a substance Binds on and enzyme

Question 15

Substrate

Answer 15

Reactant of an enzyme catalyzed reaction

Question 16

Chemical Reaction

Answer 16

Process that changes one set of chemicals into another set of chemicals by breaking and forming chemical bonds