Thunderstorms
The broad, flat top of a cumulonimbus cloud is called a...
anvil top
The lowest possible temperature at which air is able to hold all of its water vapor is the__?__.
dew point
The basic cause of all weather is the __?__.
sun
The air that we live in receives most of its warmth from the __?__.
ground
When opposite electrical charges build up in very tall clouds, ______?_____ happens.
lightning
What do we call the process in which water vapor leaves the air and changes into liquid water?
condensation
Different seasons are caused by the __?__ of the earth's axis.
tilt
The calm region of low air pressure in the center of a tornado is called the __?__.
eye
This is caused by the rapid expansion of superheated air in a storm cloud
thunder
Air is saturated when the humidity of the air is __?__ percent.
100
Winds are produced by __?__ differences on earth.
temperature
The row of thunderheads that builds up in the front of advancing cold air is called a __?__.
Squall line
This is the thin channel of charged air through which a lightning bolt can travel
step leader
What do we call water vapor that condenses and forms frozen water on the ground?
frost
Warm air is heavier or lighter than cool air?
lighter
The boundary between two air masses is called a __?__
front
What do we call lightning that does not come in contact with the ground but remains within the cloud?
sheet lightning
What do we call the amount of water vapor that the air can hold at a given temperature?
relative humidity
The earth's surface spins at over __?__ miles per hour.
1,000
This term is used to describe a cloud from which rain is falling
nimbus