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CGF3M Mon. Dec. 9, 2013
Inside a tornado- VIDEO
The most common
violent storms are
Form when warm,
moist, unstable air
begins to rise
Are most common
in mid-afternoon
Rising air is called updraft
Cumulonimbus clouds are created by this
updraft- can reach heights up to 20 KM into
Falling rain within the cloud causes some of the air to
This cold air sinks- called a downdraft
Combination of updrafts and downdrafts creates a
All thunderstorms create lightning
When particles collide within a cloud, they create friction
Larger particles become negatively charged
Smaller particles become positively charged
When the difference in charge is great enough, electrons
will “jump” in order to even out the charge, creating a
lightning bolt.
The lightning heats the air, causing it to expand quickly
and explosively, resulting in the sound of thunder
You see the lightning before you hear the thunder
because light travels faster than sound
Video: How Lightning Forms
Lightning can also occur in
clouds of snowstorms, dust
storms, or volcanic
Lightning can reach
temperatures of more than
25 000C, causing severe
burns of even death
Video: What happens if you
are stuck by lightning?