# Thunder Storms by chchxinxin

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```									Chapter 2, Lesson 2-6
Solving Equations by Multiplying or Dividing

By: Mrs. Davis
(Objective 2c)
   Lightning causes thunder because a strike of lightning is incredibly hot.

   A typical lightning bolt can immediately heat the air to between
15,000 to 60,000 degrees Fahrenheit.          Eiffel Tower May 25, 2009

   That's hotter than the surface of the sun!
   A lightning strike can heat the air in a fraction of a second.

   When air is heated that quickly, it expands violently and then
contracts……… like an explosion.

   It's that “explosion” of air that creates sound waves, which we hear
and call thunder.
   When thunder is far away we hear it
as a long, low rumble.

   When lightning strikes close by, we
hear the thunder as a loud, short
BANG.

   Lightning always produces thunder.

   When you see lightning but don't
hear any thunder, the lightning is too
far away from you for the sound-
waves to reach you.
   The flash of a lightning strike and resulting thunder occur at roughly
the same time.

   Since the speed of light is faster than the speed of sound, you’ll always
see a flash of lightning before you hear thunder.
   The sound of thunder travels
1 mile in 5 seconds

   You can set up a proportion and use equations to determine the answer to the following
problem.

Weather:
The sound of thunder travels 1 mile in 5 seconds. Suppose you see a
lightening bolt strike and then 15 seconds later you hear the sound of
thunder.

How many miles is the storm from your house?

1 mile     =     x miles
5 seconds         15 seconds

5x = 15

x = 3 miles

```
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