Lightning is electricity inside a cloud. Scientists do not know exactly
what makes this electricity. But they know that the electricity inside a
cloud can be as much as 100 million volts. From this extremely strong
electricity, a lightning bolt' like a streak of bright light, comes down
from the sky. It's temperature can reach 50000 degrees Fahrenheit
within a few millionths of a second. That's almost five times the
temperature on the sun's surface. The lightning bolt is very quick. It can
move at a speed of 87000 miles per second.A rocket traveling at this
speed would reach the moon in 2.5 second With the Lightning bolt, we
usually hear thunder, which is the sound of hot air exploding.
Lightning and thunder happen at exactly the same time, but we see
lightning first because light travels a million times faster than sound.