Chemistry: Unit 2

Question 1

Chemistry

Answer 1

The study of the composition of matter and the changes that matter undergoes

Question 2

Matter

Answer 2

anything that has mass and takes up space

Question 3

Extensive Properties

Answer 3

A property that depends on the amount of matter in a sample

Question 4

Intensive Properties

Answer 4

A property that depends on the type of matter in a sample, not the amount of matter

Question 5

Mass

Answer 5

A measure of the amount of matter that an object contains

Question 6

Volume

Answer 6

A measure of the space occupied by a sample of matter

Question 7

Physical Property

Answer 7

a quality or condition of a substance that can be observed or measured without changing the substance’s composition

Question 8

Physical Change

Answer 8

a change during which some properties of a material change, but the composition of the material does not change

Question 9

Chemical Property

Answer 9

the ability of a substance to undergo a specific chemical change

Question 10

Chemical Change

Answer 10

a change that produces matter with a different composition than the original matter

Question 11

Phase (Phase of Matter)

Answer 11

any part of a sample with uniform composition and properties

Question 12

Solid

Answer 12

a form of matter that has a definite shape and volume

Question 13

Liquid

Answer 13

a form of matter that flows, has a fixed volume, and an indefinite shape

Question 14

Gas

Answer 14

a form of matter that takes the shape and volume of its container; a gas has no definite shape or volume

Question 15

Freezing

Answer 15

a phase change resulting from a liquid to a solid

Question 16

Melting

Answer 16

a phase change resulting from a solid to a liquid

Question 17

Vaporization

Answer 17

a phase change resulting from a liquid to a gas

Question 18

Element

Answer 18

the simplest form of matter that has a unique set of properties

Question 19

Chemical Symbol

Answer 19

a code for a chemical element

Question 20

Compound

Answer 20

a substance that contains two or more elements chemically combined in a fixed proportion

Question 21

Mixture

Answer 21

a physical blend of two or more substances that are not chemically combined

Question 22

Homogeneous Mixture

Answer 22

a mixture that is uniform in composition; components are evenly distributed and not easily distinguished

Question 23

Solution

Answer 23

another name for a homogeneous mixture

Question 24

Heterogeneous Mixture

Answer 24

a mixture that is not uniform in composition; components are not evenly distributed throughout the mixture

Question 25

Filtration

Answer 25

a process that separates a solid from the liquid in a heterogeneous mixture

Question 26

Distillation

Answer 26

a process used to separate based on boiling point, which is boiled to produce a vapor, then condensed into a liquid

Question 27

Chemical Reaction

Answer 27

a change in which one or more reactants change into one or more products; characterized by the breaking of bonds in reactants and the formation of bonds in products

Question 28

Reactant

Answer 28

a substance present at the start of a reaction

Question 29

Product

Answer 29

a substance produced in a chemical reaction

Question 30

Precipitate

Answer 30

a form of matter that flows, has a fixed volume, and an indefinite shape

Question 31

Law of Conservation of Mass

Answer 31

a form of matter that flows, has a fixed volume, and an indefinite shape