Chapter 8 5Th Grade

Front 1

meteorologist

Back 1

scientists who study the weather

Front 2

greenhouse effect

Back 2

the blanketing function of the earth's atmosphere which prevents the earth's heat from escaping easily into space

Front 3

air pressure

Back 3

the pressure of atmospheric or compressed air; the total weigh o fair on some particular place on earth

Front 4

relative humidity

Back 4

the measurement of humidity that uses a prescentage to compare the actual amount of water vapor in the air with the maximum amount of vapor the air could hold at the temperature

Front 5

saturated

Back 5

refers to something such as a gas or liquid that has absorbed all of a certain substance that it can possibly hold

Front 6

dew point

Back 6

the temperature at which cooling air becomes saturated and begins to release some of its water vapor through condensation

Front 7

tropopause

Back 7

the troposphere's topmost boundary; the location of a temperature inversion

Front 8

front

Back 8

the boundary between two air masses

Front 9

source region

Back 9

a large area of land or ocean with nearly the same temperature across its entire surface

Front 10

air mass

Back 10

a single large unit of air with uniform temperatures and humidity characteristics; forms over a source region

Front 11

fog

Back 11

a cloud on the ground

Front 12

precipitation

Back 12

any form of water that falls from the clouds to the earth

Front 13

thunderhead

Back 13

another name for a cumulonimbus cloud; also called a thundercloud

Front 14

step leader

Back 14

a thin channel of charged air that descends from a cloud toward the ground through which the lightning bolt can travel

Front 15

humidity

Back 15

the amount of water vapor in the air

Front 16

False

Back 16

at a warm front, cold air ploughs under warm air, forcing the warm air to rise rapidly upward

true or False

Front 17

True

Back 17

The atmosphere's greenhouse effect prevents the earth's heat from escaping easily into space

True or False

Front 18

True

Back 18

saturated air has a relative humidity of 100%

True or False

Front 19

False

Back 19

A tornado warning is issued when weather conditions could produce a tornado

true or false

Front 20

false

Back 20

at temperatures near freezing, falling ice crystals clump together into large snowflakes

true or false

Front 21

false

Back 21

sheet lightning is heat lightning far off in the distance

true or false

Front 22

false

Back 22

tropical rain starts out as tiny ice crystals in the top of clouds

true or false

Front 23

cirrus

Back 23

I fly high and am easy to sight, for I look like a mare's tail all wispy and white

Front 24

cirrocummulus

Back 24

a heap cloud am I, but I fly so high that I look like fish scales in the sky

Front 25

altocummulus

Back 25

I'm patchy and puffy, all bumpy and white; I soar in the sky at a medium hight

Front 26

alto stratus

Back 26

I'm a thickening sheet at medium height that tries very hard to block the sunlight

Front 27

stratus

Back 27

like a blanket that's darkish-gray, I fly low to drizzle your day

Front 28

stratocumulus

Back 28

I'm a low layer cloud, that is true, yet bumpy and rolling I fly in your view

Front 29

nimbostratus

Back 29

I'm a heavy blanket all dark and gray; when I bring rain, I stay for the day

Front 30

cumubus

Back 30

I'm small and light, and puffy and white; I'm seen in good weather when the sun shines bright

Front 31

cumulunimbus

Back 31

on hot summer days I thunder and shout, pouring raindrops and hail until I wear out