Question

Assertion (A): Troposphere extends to a height of 18 kilometres at the equator and about 8 kilometres at the poles.

Reason (R): Earth’s axis is tilted.

पर्याय

• Both A and R are true, and R is the correct reason for A.

• Both A and R are true, but R is not the correct reason for A.

• A is true, and R is false.

• A is false, and R is true.

Answer 1

Both A and R are true, but R is not the correct reason for A.

Explanation:

The troposphere extends higher (about 18 km) at the equator because air is warmer there, causing it to expand. At the poles, the air is colder and denser, so the troposphere is lower (about 8 km). This variation is due to temperature differences, not Earth’s axial tilt. The tilt causes seasons but does not directly affect the troposphere’s height variation.