About Lesson
D.2. Clouds
A cloud is a mass of water drops or ice crystals suspended in the atmosphere. Clouds form when water condenses in the sky. The condensation lets us see the water vapour. There are many different types of clouds – Cirrus, Cumulus, Stratus, Nimbus, etc.
A combination of these four basic types of clouds can be again divided into three types:
- High clouds- Cirrus, cirrostratus etc.
- Middle clouds – Altostratus, altocumulus; etc
- Low clouds – Stratocumulus and nimbostratus.