Question

1. The composition of nitrogen and oxygen in the atmosphere is 78% and 21% respectively.

2. The oxygen cycle is the movement of oxygen in its various forms through the atmosphere.

3. Biosphere is the zone where the hydrosphere, lithosphere, and atmosphere interact with each other.

Select the incorrect statements from the following.

• A. Only 1
• B. Only 3
• C. Only 2
• D. Only 2 and 3

Answer 1

The correct option is C Only 2

• The atmosphere is a layer of gases that surrounds the Earth. It contains important gases necessary for sustaining life. The composition of Oxygen and Nitrogen in the atmosphere is 21% and 78% respectively.
• The oxygen cycle refers to the movement of oxygen in its various forms through the atmosphere, lithosphere, and biosphere.
• The zone where the lithosphere, hydrosphere, and atmosphere interact with each other is called the Biosphere.

Thus, among the three statements, only the 2nd statement is incorrect.