How are clouds formed?
A large amount of water evaporates from the water bodies and goes into the air. Some amount of water vapour also gets into the air due to various biological activities. The hot air rises up carrying the water vapour with it. As the air rises up, it gets cooled. Cooling causes the water vapour in the air to condense in the form of tiny droplets around dust and other suspended particles in the air. This leads to the formation of clouds.
What is soil erosion?
List any three human activities that you think would lead to air pollution.
Why do organisms need water?
Do you know of any activity which may be polluting this water source?
