Test 8

Question 1

The basic cause of all weather

Answer 1

the sun

Question 2

scientists who study the weather

Answer 2

meteorologists

Question 3

the imaginary line running through the earth from North Pole to South Pole

Answer 3

axis

Question 4

the air that we live in receives most of its warmth from

Answer 4

the ground

Question 5

different seasons are caused by the ___ of the earth’s axis

Answer 5

tilt

Question 6

winds are produced by ____ differences on the earth.

Answer 6

temperature

Question 7

warm air is ___ than cool air

Answer 7

lighter

Question 8

the earth’s surface spins at over ___ miles per hour

Answer 8

1,000

Question 9

Be able to label these wind systems on the diagram of the earth. Mark with a star the two areas of the earth that have the most changeable weather

Answer 9

polar easterlies
prevailing westerlies*
(northeast) trade winds
(southeast) trade winds
prevailing westerlies*
polar easterlies

Question 10

The amount of water vapor that the air can hold at a given temperature is the ___ ____ of the air

Answer 10

relative humidity

Question 11

the lowest possible temperature at which air is able to hold all of its water vapor

Answer 11

dew point

Question 12

the process in which water vapor leaves the air and changes into liquid water is called

Answer 12

condensation

Question 13

Air is saturated when the humidity of the air is ___ percent

Answer 13

100

Question 14

water vapor that condenses to form liquid water on the ground is called ___

Answer 14

dew

Question 15

water vapor that condenses and forms frozen water on the ground is called ___

Answer 15

frost

Question 16

an ice crystal in a cloud becomes too heavy, falls, melts, and lands on the earth as liquid water

Answer 16

rain

Question 17

falling ice crystals melt slightly, stick, and freeze together into snowflakes

Answer 17

wet snow

Question 18

falling ice crystals melt into raindrops, then refreeze and land on earth as tiny pieces of ice

Answer 18

sleet

Question 19

falling ice crystals melt, hit the earth as liquid rain, but refreeze as soon as they land

Answer 19

freezing rain

Question 20

a small piece of ice is tossed up and down inside a cloud, forming several layers of ice, until it is too heavy and falls to earth

Answer 20

hail

Question 21

puffy, bulgy clouds belong to the ___ family

Answer 21

cumulus

Question 22

layers of flat clouds belong to the ___ family

Answer 22

stratus

Question 23

wispy, curly clouds very high in the atmosphere belong to the ___ family

Answer 23

cirrus

Question 24

sheets of clouds that often produce rain are ___ clouds

Answer 24

stratus

Question 25

clouds made of very small ice crystals are ___ clouds

Answer 25

cirrus

Question 26

"thunderhead" is another name for a ___ cloud

Answer 26

cumulonimbus

Question 27

a term used to describe a cloud from which rain is falling is ___

Answer 27

nimbus

Question 28

the broad, flat top of a cumulonimbus cloud is called an

Answer 28

anvil top

Question 29

when opposite electrical charges build up in very tall clouds, ___ is produced

Answer 29

hail

Question 30

the rapid expansion of superheated air causes shock waves that we hear as ___

Answer 30

thunder

Question 31

the type of storm that packs the most destructive power into the smallest space

Answer 31

tornado

Question 32

the calm region of very low air pressure in the center of a tornado

Answer 32

the eye

Question 33

if a tornado has been spotted, meteorologists issue a tornado ___

Answer 33

warning

Question 34

the thin channel of charged air through which a lightning bolt can travel

Answer 34

step leader

Question 35

lightning bolts that do not come in contact with the ground but remain within the cloud

Answer 35

sheet lightning

Question 36

the row of thunderheads that builds up in the front of advancing cold air

Answer 36

squall line

Question 37

the boundary between two air masses

Answer 37

front

Question 38

Write a paragraph describing five precautions you should take during a thunderstorm.

Answer 38

blah, blah, blah You need to figure this out.