Thunder
• The lightning stroke can heat the air through
which it travels to 30,000ºC
(54,000ºF), which is 5 times hotter than the
surface of sun.
•This
extreme heating causes the air to expand explosively, thus initiating a shock wave that become a booming sound
wave (thunder) to travel outward.
• It takes 3 seconds for thunder to travel 1 km
(5 seconds to travel 1 mile).