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V.
Storms:
A
violent disturbance
in the atmosphere.
Sudden
change
in air pressure
and rapid
air movements.
1. Rainstorms and
snowstorms
are formed when two
different fronts collide.
If the windspeed increases
during a snowstorm a blizzard
results. If the temperature drops
during a rainstorm, then an ice
storm results.
2. Thunderstorms:
When a cold front moves in and meets a warm front,
cumulonimbus clouds produce thunderstorms. (Heavy
rain, thunder, and lightning) During thunderstorms
the positive charges (+)
build in clouds and the negative
Earth (-)
attracts it.
3. Cyclones:
are low
pressure
that contain rising warm air. Cooler
air moves in to take
the place of the rising warm air. The winds move counterclockwise.
Cyclones bring rainy,
stormy weather.
4. Anticyclones:
are high pressure areas that contain cold,
dry
air. The winds move in a clockwise
direction and clear,
dry
, fair weather ussually
occur.
5. Hurricanes:
are a powerful cyclone
that forms over tropical oceans.
(It's called a typhoon if it is over the
Pacific
Ocean)
Hurricanes are the most
powerful storms on
Earth and are dangerous
to people in the coastal areas. Hurricanes cause heavy
rains, flooding,
and destruction.
6. Tornadoes:
are whirling, funnel-shaped cloud that is destructive.
When this low pressure system touches the ground, it acts
like a giant vacuum cleaner.
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