PS Quarterly Exam

Question 1

Atom

Answer 1

The smallest chemical unit of matter

Question 2

Molecule

Answer 2

Two or more atoms linked together to form a substance with unique properties

Question 3

Concentration

Answer 3

The quality of a substance within a certain volume

Question 4

If something can be broken down, is it an atom or a molecule?

Answer 4

Molecule

Question 5

Molecules have…

Answer 5

Unique properties

Question 6

Hydroxycarbonate colors things…

Answer 6

greenish-blue

Question 7

Have scientists seen atoms?

Answer 7

no

Question 8

centi

Answer 8

0.01

Question 9

milli

Answer 9

0.001

Question 10

kilo

Answer 10

1000

Question 11

English unit for mass

Answer 11

slug

Question 12

Metric unit for mass

Answer 12

gram

Question 13

Metric unit for volume

Answer 13

liter

Question 14

English unit for volume

Answer 14

gallon

Question 15

Metric unit for length

Answer 15

meter

Question 16

English unit for length

Answer 16

foot

Question 17

Humidity

Answer 17

The moisture content of air

Question 18

Absolute Humidity

Answer 18

The mass of water vapor contained in a certain volume

Question 19

Relative Humidity

Answer 19

The ratio of the mass of water vapor in the air at a given temperature to the maximum mass of water vapor the air could hold at that temperature expressed as a percentage

Question 20

Greenhouse effect

Answer 20

The process by which certain gases trap heat that radiates from earth

Question 21

Parts per million

Answer 21

The number of molecules or atoms of a substance in a mixture for every one million molecules or atoms in that mixture

Question 22

Why does sweating cool you down?

Answer 22

Because the water evaporates off your skin and takes energy from your skin in the form of heat

Question 23

What is the percentage of nitrogen in dry air?

Answer 23

78%

Question 24

What is the percentage of oxygen in dry air?

Answer 24

21%

Question 25

What makes up the majority of the air we exhale?

Answer 25

nitrogen

Question 26

Do we exhale more carbon dioxide or oxygen?

Answer 26

oxygen

Question 27

10,000 ppm

Answer 27

1 %

Question 28

Cost/benefit analysis-

Answer 28

To see if the benefit is worth the cost

Question 29

Atmosphere

Answer 29

The mass of air surrounding a planet

Question 30

Barometer

Answer 30

An instrument used to measure atmospheric pressure

Question 31

Homosphere

Answer 31

The lower layer of the earth's atmosphere

Question 32

Heterosphere

Answer 32

The upper layer of the earth's atmosphere

Question 33

Jet streams

Answer 33

Narrow bands of high speed winds that circle the earth

Question 34

Heat

Answer 34

Energy that is transferred as a consequence of temperature differences

Question 35

Temperature

Answer 35

The measure of the energy of random motion in a substances molecules

Question 36

troposphere

Answer 36

weather layer

Question 37

stratosphere

Answer 37

ozone layer

Question 38

homosphere=

Answer 38

troposphere, stratosphere, and mesosphere

Question 39

heterosphere=

Answer 39

thermosphere and exosphere

Question 40

Electrolysis

Answer 40

The use of electricity to break a molecule down into smaller units

Question 41

Polar molecule

Answer 41

A molecule that has slight positive and negative charges due to an imbalance in the way electrons are shared

Question 42

Solvent

Answer 42

A liquid substance capable of dissolving other substances

Question 43

Solute

Answer 43

A substance that is dissolved in a solvent

Question 44

Cohesion

Answer 44

Individual molecules are so strongly attracted to each other they tend to stay together, even when exposed to tension

Question 45

Hard water

Answer 45

Water that has certain dissolved ions in it - predominately calcium and magnesium ions

Question 46

Why water liquid?

Answer 46

Hydrogen bonding