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科学素养与生活应用·英语30篇(3)

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Why Thunder Follows Lightning

Why Thunder Follows Lightning

为什么雷声总在闪电之后

  1. Lightning heats air to over 30,000°C in a flash.
  2. This sudden heat makes air expand very fast.
  3. The fast expansion creates a loud sound wave.
  4. That sound wave is what we hear as thunder.
  5. Light travels faster than sound, so we see first.
  6. If lightning is one kilometer away, thunder arrives in three seconds.
  7. Thunder cannot happen without lightning.
  8. You can estimate storm distance by counting seconds.
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