¹     It was pouring outside! The rain was pounding the rooftop. Matt peeked through his blankets and saw a bright flash outside. Then, he closed his eyes and tried to sleep. Suddenly he heard a huge boom! What was that noise? Had a tree fallen? Was the roof breaking? Was someone bowling up in the clouds? No, it was just a clap of thunder.
 
²     The bright light that Matt saw was lightning. The loud boom that he heard was thunder. Thunder and lightning go hand-in-hand. You can't have thunder without lightning. Lightning is very hot. When a bolt flashes in the sky, it makes the air explode. Thunder is the sound from the exploding air.

Paragraphs 3 to 4:
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