Name at least four land pollutants.

Name the layers of the soil profile.

What is soil erosion? List any two ways of preventing soil erosion.

Explain solar eclipse with a well-labelled diagram.

State any three causes of water pollution.

Why does magma exist, in molten state under earth's crust?

How is atmosphere useful to us?

Give an example to discuss the difficulty faced due to friction.

Explain the simple machine, wheel and axle.