What causes lightning and thunder?
Have you ever wondered why we have thunder and lightning during storms? Well, this is because when clouds move around in the sky, they bump into each other and create electricity. This electricity builds up until it suddenly bursts out in a big flash of lightning! The lightning is like a super-fast bolt of energy that lights up the sky. And the loud rumbling thunder you hear afterwards is because the lightning heats up the air so fast that it makes a booming noise.
Thunderstorms always have lightning (since thunder is caused by lightning, and you can't have a thunderstorm without thunder), but you can have lightning without a thunderstorm. Lighting can also be seen in volcanic eruptions, extremely intense forest fires, surface nuclear detonations, and even in heavy snowstorms! It is possible that you might see lightning and not hear any thunder, because it was too far away. Sometimes this is called 'heat lightning' because it occurs most often in the summer. So, the next time you see lightning and hear thunder, remember that it's just nature putting on a spectacular show for us to enjoy!
