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十万个为什么·科学阅读30篇(3)

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What Makes Thunder and Lightning?

What Makes Thunder and Lightning?

雷声和闪电是怎么产生的?

  1. Lightning is a big spark of electricity.
  2. It happens inside storm clouds or between clouds and ground.
  3. Ice and water move fast in clouds.
  4. This builds up positive and negative charges.
  5. When the charge difference gets too big, lightning flashes.
  6. Light travels very fast, so we see it first.
  7. Thunder is the sound of hot air exploding.
  8. We hear thunder later because sound is slower.
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