- Air and atmosphere.
- Atmospheric phenomena.
- Air pollution.
- Water and its states.
- Hydrosphere.
- The water cycle.
- How we use water.
- How to save water.
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Watch these videos about:
Learn more about atmosphere.

Complete this exercise about The three states of water.
Play this game about:
Watch this animation about the water cycle.
Play this game about the water cycle.
To learn more about the water cycle:
Learn how we use water