What causes thunder?

What causes thunder?

When a bolt of lightning shoots through the atmosphere, it heats the air to an amazing 50,000 degrees Fahrenheit in a tiny fraction of a second. The superheated air rapidly expands, cools and contracts, causing shock waves. These shock waves create sound waves, which we hear as thunder.

Fact Monster/Information Please® Database, © 2005 Pearson Education, Inc. All rights reserved.

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