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Canyon
Grade 4
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It's Shocking

A buildup of electrical charge causes electricity. This discharge can produce lightning from a huge cloud called a(n) . One hundred million can be powered by just one bolt. Lightning targets the shortest, clearest . That’s why people use lightning to discharge lightning into the ground. Inside thunderclouds, rub together. At the top of the cloud, particles gather together. Heavy, negative particles settle at the of the cloud. The ground stays positive relative to the clouds. Soon, with enough build up of , lightning strikes.