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 occupies 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 the SI base unit of mass is the kilogram

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 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

Condensation

Answer 18

A phase change resulting from a gas to a liquid

Question 19

Sublimation

Answer 19

A phase change resulting from a solid to a gas

Question 20

Deposition

Answer 20

A phase change resulting from a gas to a liquid

Question 21

Substance (Pure substance)

Answer 21

Matter that has a uniform and definite composition; either an element or a compound; also called pure substance

Question 22

Element

Answer 22

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

Question 23

Chemical Symbol

Answer 23

A one- or two-letter representation of an element

Question 24

Compound

Answer 24

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

Question 25

Mixture

Answer 25

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

Question 26

Homogenous Mixture

Answer 26

A mixture that is uniform in composition; components are evenly distributed and not easily distinguish

Question 27

Solution

Answer 27

Another name for homogenous mixture

Question 28

Heterogeneous Mixture

Answer 28

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

Question 29

Filtration

Answer 29

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

Question 30

Distillation

Answer 30

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

Question 31

Chemical Reaction

Answer 31

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 32

Reactant

Answer 32

A substance present at the start of a reaction

Question 33

Product

Answer 33

A substance produced in a chemical reaction

Question 34

Precipitate

Answer 34

A solid that forms and settles out of a liquid mixture

Question 35

Law of Conservation of Mass

Answer 35

In any physical change or chemical reaction, mass is conserved