Thunder is the loud sound that lightning makes.
Lightning heats the air so fast that it makes a big boom. We see the flash first, then hear the rumble a moment later.
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Snow is made of tiny ice crystals falling from clouds.
Lightning is about five times hotter than the surface of the Sun.
Wind is just air moving from one place to another.
Rainbows are actually full circles — we usually just see the top half.
A rainbow appears when sunlight shines through raindrops.