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Flashcards in Test 8 Deck (38):
1

The basic cause of all weather

the sun

2

scientists who study the weather

meteorologists

3

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

axis

4

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

the ground

5

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

tilt

6

winds are produced by ____ differences on the earth.

temperature

7

warm air is ___ than cool air

lighter

8

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

1,000

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

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

10

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

relative humidity

11

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

dew point

12

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

condensation

13

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

100

14

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

dew

15

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

frost

16

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

rain

17

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

wet snow

18

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

sleet

19

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

freezing rain

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

hail

21

puffy, bulgy clouds belong to the ___ family

cumulus

22

layers of flat clouds belong to the ___ family

stratus

23

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

cirrus

24

sheets of clouds that often produce rain are ___ clouds

stratus

25

clouds made of very small ice crystals are ___ clouds

cirrus

26

"thunderhead" is another name for a ___ cloud

cumulonimbus

27

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

nimbus

28

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

anvil top

29

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

hail

30

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

thunder

31

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

tornado

32

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

the eye

33

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

warning

34

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

step leader

35

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

sheet lightning

36

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

squall line

37

the boundary between two air masses

front

38

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

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