Chapter 1

Question 1

Precision

Answer 1

Closeness of a measurement to its true value

Question 2

Physical Property

Answer 2

any property of a substance that can be observed or measured without changing its chemical identity

Question 3

chemical property

Answer 3

any property of a substance that can only be studied by changing its chemical identity or composition

Question 4

compound

Answer 4

a substance composed of atoms of 2 or more elements that are chemically combined in fixed proportions

Question 5

Density

Answer 5

mass of a substance divided by its volume, physical property

Question 6

element

Answer 6

substance that can’t be separated into smaller substances by chemical means. an element consists of one type of atom in which all the atoms have the same properties.

Question 7

extensive property

Answer 7

a property that depends on how much matter is being considered

Question 8

intensive property

Answer 8

a property that is independent of the amount of matter that is being considered

Question 9

mixture

Answer 9

a combination of two or more substances in which each substance retains its identity. mixtures do not have fixed proportions

Question 10

heterogeneous mixture

Answer 10

a mixture in which the individual components remain physically separated and can be seen as separate components.

Question 11

homogenous mixture (solution)

Answer 11

a mixture in which the composition of the solution is the same, after sufficient stirring

Question 12

Hypothesis

Answer 12

a tentative or potential explanation for a set of observations

Question 13

theory

Answer 13

a tested explanation of natural phenomena. a unifying principle that explains a body of observations, facts, and data and the (natural) laws based upon them

Question 14

law

Answer 14

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

Question 15

kelvin

Answer 15

the SI base unit for temperature; unit for the absolute temperature scale

Question 16

Liter

Answer 16

the SI base unit for volume; also the volume occupied buy a one cubic decimeter

Question 17

Meter

Answer 17

the Si base unit for length

Question 18

Mass

Answer 18

The measure of the quantity of the amount of matter contained in an object

Question 19

matter

Answer 19

anything that occupies space and possesses mass

Question 20

volume

Answer 20

the space occupied by an object; also the cube of the length

Question 21

weight

Answer 21

the force that gravity exerts on an object

Question 22

substance

Answer 22

a form of matter that has a definite or constant composition and has distinct properties

Question 23

qualitative

Answer 23

describing general observations about a system

Question 24

quantitative

Answer 24

consisting of numbers or numerical values obtained by a series of measurements of a system.

Question 25

Kelvin temp formula

Answer 25

K= Celsius + 273.15k

Question 26

Fahrenheit temp formula

Answer 26

F=1.8*Celsius+32F

Question 27

Celsius temp formula

Answer 27

C=(F-32F)X(5/9)