Science & Nature

Lightning and Thunder

A simple explanation of why lightning flashes before we hear the thunder.

B17 min

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Type what you hear (Bấm vào bất kỳ từ nào trong bài để tra từ điển 1-click)

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1A summer storm can fill the sky with sudden bright flashes.

2Inside the tall clouds, small pieces of ice crash together.

3These constant crashes slowly build up electric energy inside the cloud.

4Soon the energy jumps down toward the wet ground below.

5We see this huge jump as a flash of lightning.

6A bolt of lightning heats the air around it very quickly.

7The hot air expands fast and makes a loud bang.

8That sound is the thunder we hear after the flash.

9Light travels faster than sound, so we see lightning first.

10Count the seconds to learn how far the storm is.

11During a storm, stay inside and far away from windows.

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