How do metals occur in nature? Give some examples for any two types of minerals.

How do winds occur?

Give some examples for corrosion.

How do the alkali metals occur in nature? Give the names and formulae of any two minerals of an alkali metal.

Give examples to any two pollutants.

How deos alkalimetals occur in nature? Discuss

Give some examples for food preservation.

Give some example for natural resources.

Give some examples of aquatic habitats.

Give some examples for hand picking method of separation.

Give two examples for each type of algebraic expression.