Chapter 1 and 2

Question 1

Chemical

Answer 1

any substance that has a definite composition

Question 2

Mass

Answer 2

a measure of the amount of matter.

Question 3

Matter

Answer 3

anything that has mass and takes up space

Question 4

Atom

Answer 4

s the smallest unit of an element that maintains the chemical identity of that element.

Question 5

Element

Answer 5

a pure substance that cannot be broken down into simpler, stable substances and is made of one type of atom

Question 6

Compound

Answer 6

a substance that can be broken down into simple substances

Question 7

Extensive Properties

Answer 7

depend on the amount of matter that is present

Question 8

Intensive Properties

Answer 8

do not depend on the amount of matter present

Question 9

Physical Property

Answer 9

characteristic that can be edited or changed with out changing the property of the substance

Question 10

Physical Change

Answer 10

change in substance that does not involve a change in the identity of the substance

Question 11

Change of State

Answer 11

a physical change of substance form one state to another

Question 12

solid

Answer 12

a state where the matter has definite volume and definite shape

Question 13

liquid

Answer 13

a state where the matter but an indefinite shape

Question 14

gas

Answer 14

a state where the matter has neither definite volume nor definite shape

Question 15

plasma

Answer 15

a high-temperature physical state of matter in which atoms lose most of their electrons, particles that make up atoms

Question 16

chemical property

Answer 16

a property that relates to a substance’s ability to undergo changes that transform it into different substances

Question 17

chemical change/chemical reaction

Answer 17

a change in which one or more substances are converted into different substances

Question 18

reactants

Answer 18

the substances that react in a chemical change

Question 19

products

Answer 19

the substances that are formed by the chemical change

Question 20

mixture

Answer 20

a blend of two or more kinds of matter, each of which retains its own identity and properties

Question 21

homogeneous

Answer 21

mixtures that are uniform in composition

Question 22

solution

Answer 22

another name for homogeneous mixtures

Question 23

heterogeneous

Answer 23

mixtures that are not uniform throughout

Question 24

pure substance

Answer 24

a substance with a fixed composition

Question 25

groups/families

Answer 25

the vertical columns of the periodic table

Question 26

periods

Answer 26

the horizontal rows of elements in the periodic table

Question 27

metal

Answer 27

an element that is a good electrical conductor and a good heat conductor

Question 28

nonmetal

Answer 28

an element that isis a poor conductor of heat and electricity

Question 29

metalloid

Answer 29

an element that hos some characteristics of metals and some characteristics of nonmetals

Question 30

scientific method

Answer 30

a logical approach to solving problems by observing and collecting data, formulating hypotheses, testing hypotheses, and formulating theories that are supported by data

Question 31

system

Answer 31

a specific portion of matter in a given region of space that has been selected for study during an experiment or observation

Question 32

hypothesis

Answer 32

a testable statement

Question 33

model

Answer 33

an explanation of how phenomena occur and how data or events are related.

Question 34

theory

Answer 34

a broad generalization that explains a body of facts of phenomena

Question 35

quantity

Answer 35

something that has magnitude,size, or amount

Question 36

SI

Answer 36

a single measurement system called Le System International d’Unites that is used by

Question 37

weight

Answer 37

a measure of the gravitational pull on matter

Question 38

Derived Units

Answer 38

combinations of Si base units

Question 39

Volume

Answer 39

the amount of space occupied by an object

Question 40

Density

Answer 40

the ratio of mass volume, or mass divided by volume

Question 41

Conversion factor

Answer 41

a ration derived from the equality between two different units that can be used to convert form one unit to the other

Question 42

Dimensional Analysis

Answer 42

a mathematical technique that allows you to use units to solve problems involving measurements

Question 43

accuracy

Answer 43

the closeness of measurements to the correct or accepted value of the quantity measured

Question 44

precision

Answer 44

the closeness of a set of measurements of the same quantity made in the same way

Question 45

percentage error

Answer 45

it is calculated by subtracting the accepted value from the experimental value, dividing the difference by the accepted value and than multiplying by 100

Question 46

significant Figures

Answer 46

the figures in a measurement that consist of all the digits known with certainty plus one final digit, which is somewhat uncertain or is estimated

Question 47

Scientific notation

Answer 47

a notation in which numbers are written in the form M*10^n, where the factor M is a number greater or equal to one but less then 10, and n is a whole number

Question 48

Directly Proportional

Answer 48

when dividing one quantity by the other gives a constant value

Question 49

inversely proportional

Answer 49

When two quantities product is constant