1. Clouds
By Mr. Sobol

2. Stratus
They look like a huge gray blanket that hangs low in the sky. Sometimes stratus clouds are on the ground or very near the ground, and then we call them fog.

3. Cirrus
Most of the time, you see cirrus clouds very high up in the sky, looking thin and wispy, like someone pulled a bigger cloud apart into little bits of cloud.

4. Cumulous
Cumulus clouds are clouds that are piled up on top of each other. "Cumulus" means a pile in Latin, as in our word "accumulate" meaning to pile up.