Chapter 1 - Chemistry: The Study of Change

Question 1

Accuracy

Answer 1

the closeness of a measurement to the true value of the quantity that is measured

Question 2

Chemical Property

Answer 2

any property of a substance that cannot be studied without converting the substance into some other substance

Question 3

Chemistry

Answer 3

the study of matter and the changes it undergoes

Question 4

Compound

Answer 4

a substance composed of atoms of two or more elements chemically united in fixed proportions

Question 5

Density

Answer 5

The mass of a substance divided by its volume

Question 6

Element

Answer 6

a substance that cannot be separated into simpler substances by chemical means

Question 7

Extensive property

Answer 7

a property that depends on how much matter is being considered

Question 8

Heterogenous mixture

Answer 8

The individual components of a mixture remain physically separated and can be seen as separate components

Question 9

Hypothesis

Answer 9

a tentative explanation for a set of observations

Question 10

Intensive property

Answer 10

a property that does not depend on how much matter is being considered

Question 11

International System of Units

Answer 11

a system of units based on metric units

Question 12

Kelvin

Answer 12

The SI base unit of temperature

Question 13

Law

Answer 13

A concise verbal or mathematical statement of a relationship between phenomena that is always the same under the same conditions

Question 14

Liter

Answer 14

The volume occupied by one cubic decimenter

Question 15

Macroscopic property

Answer 15

properties that can be measured directly

Question 16

Mass

Answer 16

A measure of the quantity of matter contained in an object

Question 17

Matter

Answer 17

Anything that occupies space and possesses mass

Question 18

Microscopic property

Answer 18

properties that cannot be measured directly without the aid of a microscope or other special instrument

Question 19

Mixture

Answer 19

a combination of two or more substances in which the substances retain their distinct identities

Question 20

Physical property

Answer 20

any property of a substance that can be observed without transforming the substance into some other substance

Question 21

Precision

Answer 21

the closeness of agreement of two or more measurements of the same quantity

Question 22

Qualitative

Answer 22

consisting of general observations about the system

Question 23

Quantitative

Answer 23

comprising numbers obtained by various measurements of the system

Question 24

Scientific method

Answer 24

a systematic approach to research

Question 25

Significant figures

Answer 25

the number of meaningful digits in a measured or calculated quantity

Question 26

Substance

Answer 26

A form of matter that has a definite or constant composition (the number and type of basic units present) and distinct properties

Question 27

Theory

Answer 27

a unifying principle that explains a body of facts and/or those laws that are based on them

Question 28

Volume

Answer 28

A measure of the size of a body or region in three-dimensional space. It is the length cubed.

Question 29

Weight

Answer 29

force that gravity exerts on an object