Rain, snow and wind are weather.
Weather can change in a day. It can change in an hour.
The sun heats the ground. The ground heats the air.
A cloud is made of tiny drops of water.
Rain falls when the drops get too big.
Snow needs cold. If it is warm, snow melts and is rain.
Fog is a cloud on the ground.
Lightning is a big spark in the sky. Thunder is its sound.
When thunder roars, go in. A house is safe from lightning.
Words to know
- weather: what air does
- lightning: sky spark
- thunder: storm sound
- fog: ground cloud
