Question

Which of the following statements is true regarding the earth's atmosphere?

• A. It gets denser with an increase in the altitude
• B. It gets thinner with an increase in the altitude
• C. It remains the same.
• D. It contains no solid particles.

Answer 1

The correct option is B

It gets thinner with an increase in the altitude

The density of air decreases with an increase in altitude. At higher altitudes, earth's gravity is lesser since it is farther from the centre of the earth. This allows the air molecules to spread out more, and thus air density is lesser at higher altitudes.