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The basic cause of all weather

sun

Scientists that study weather

Meteorologist

How fast does the earth's surface spin

1,000

Which is heavier warm air or cool air

cool air

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

Axis

What causes wind

earth's temperature differences

Earth has seasons because the axis is what

tilted

polar easterlies

those winds that originate in the polar regions; in the Southern Hemisphere they blow out of the southeast , and in the Northern Hemisphere they blow out of the north east

Prevailing westerlies

The winds of the middle latitudes in both hemispheres

What are trade winds

the winds nearest the equator; north of the equator ,these winds blow out of the northeast ,and south of the equator , they blow out of the southeast

The amount of water vapor that the air can hold at a given temperature is called what?

relative humidity

Another name for a thunderhead

cumulonimbus

term used to describe a cloud from which rain is falling

nimbus family

Clouds made of very small ice crystals

cirrus

Layers of flat clouds belong to which family of clouds

stratus

Wispy, curly clouds very high in the atmosphere

cirrus

Sheet clouds that often produce rain

stratus

The broad, flat top of a cumulonimbus is called a what

anviltop

The rapid expansion of superheated air causes shock waves that we hear

thunder

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

sleet

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

dew piont

Ice crystals in a cloud becomes to heavy, falls, melts, and lands on the earth as water

rain

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

Wet snow...

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

hail...

Puffy, bulgy, clouds

cumulus

When opposite electrical charges build up in very tall clouds what is produced

lightning

The thin channel of charged air through which a lighting bolt can travel is called

step ladder

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

eye

What do meteorologists issue when a tornado has been spotted

warning

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

tornado

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

condensation

Air is saturated when the humidity is at what percent

100

The row of thunderheads that builds up in the front advancing cold air is called what

squall line

The boundary between two air masses is called what

the front

Lightning bolts that do not come in contact with the ground but remain within the cloud are known as what

sheet lightning

Top seven precautions you should take in a thunderstorm

stay indoors, if outside avoid being the tallest thing around, away from high ground, keep away from tall objects, avoid water, no electrical appliances, and if your hair is standing up on it's end curl up and crouch down.

The air that we live in receives most of its warmth from where

the sun

Water vapor that condenses to form liquid water on the ground

condensation

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

freezing rain

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