Lightning is a giant spark of electricity that happens during a storm. Inside st clouds, ti pieces o ice cr into o another a build u an elec charge. Wh the cha becomes strong enough, electricity jumps between the cloud and the ground or between different parts of the cloud. The air around the lightning becomes extremely hot and expands very quickly, and this creates the loud sound we call thunder.

Type only the missing letters. Each box is one letter, and the number of boxes matches the letters that are missing.