Chapter 2: Matter & Change

Question 1

Matter

Answer 1

Anything that has mass & volume

Question 2

Volume

Answer 2

Measure of the amount of space that a substance of an object takes up

Question 3

Substance

Answer 3

Matter that has a uniform & definite composition

Question 4

Compound

Answer 4

A substance composed of identical molecules consisting of atoms of 2 or more chemical elements

Question 5

Elements

Answer 5

A pure substance consisting of only one type of atom

Question 6

Physical property

Answer 6

Characteristics of a substance that can be observed or measured without changing the identity of the substance

Question 7

Melting point

Answer 7

The temperature at which it changes from solid to liquid

Question 8

Boiling point

Answer 8

The temperature where the liquid-gas phase change occurs

Question 9

Extensive

Answer 9

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

Question 10

Intensive

Answer 10

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

Question 11

Solid

Answer 11

Definite shape (rigid), definite volume, & particles vibrate around fixed axes

Question 12

Liquid

Answer 12

No definite shape, has definite volume, & particles are free to move over each other, but are still attached to each other

Question 13

Gas

Answer 13

No definite shape, no definite volume, particles move in random motion with little or no attraction to each other, & highly compressible

Question 14

Plasma

Answer 14

State of matter that resembles a gas but has certain properties that gases do not have

Question 15

Melting

Answer 15

Example of physical change

Question 16

Vaporization

Answer 16

Liquid to gas

Question 17

Freezing

Answer 17

Liquid to solid

Question 18

Condensation

Answer 18

Gas to liquid

Question 19

Mixture

Answer 19

Combo of 2 or more substances in any proportion

Question 20

Solution

Answer 20

Homogeneous mixture with tiny particles

Question 21

Colloid

Answer 21

Homogeneous mixture with medium-sized particles

Question 22

Suspension

Answer 22

Heterogeneous mixture with large particles

Question 23

Homogeneous

Answer 23

A mixture in which the composition is uniform throughout the mixture

Question 24

Heterogeneous

Answer 24

A mixture in which the composition is not uniform throughout the mixture

Question 25

Phase

Answer 25

Any part of a sample that has a uniform composition & properties

Question 26

Chromatography

Answer 26

Separation of mixtures by passing it in solution or suspension, or as vapor, through a medium in which the components move at different rates.

Question 27

Distillation

Answer 27

An effective method to separate mixtures that are comprised of 2 or more pure liquids

Question 28

Evaporation

Answer 28

A technique used to separate out homogeneous mixtures that contain 1 or more dissolved salts

Question 29

Filtration

Answer 29

A separation method used to separate out solids and liquids

Question 30

Chemical change

Answer 30

A change that produces matter with a different composition

Question 31

Chemical reaction

Answer 31

A process in which some substances change into different substances (same as chemical change)

Question 32

Chemical symbol

Answer 32

A one or 2 letter designation of an element

Question 33

Chemical formula

Answer 33

An expressions that shows the elements in a compound & the relative proportions of those elements

Question 34

Chemical property

Answer 34

Describes the ability of a substance to undergo a specific chemical change

Question 35

Chemical equation

Answer 35

Representation of a chemical reaction

Question 36

Reactant

Answer 36

A substance that is present at the start of a chemical reaction

Question 37

Product

Answer 37

A substance that is present at the end of a chemical reaction

Question 38

Precipitate

Answer 38

A solid produced as a result of a chemical reaction