Question

Warmer air is:

• A. Lighter than cold air
• B. Heavier than cold air
• C. Both have equal weights
• D. We cannot say

Answer 1

Answer: (A)

Lighter than cold air

In warm air the molecules are farther away from each other because of more energy, hecne density is less , that is , less molecules per unit volume ,hence it is lighter. While in cold air molecules are closer (density is more ) hence it is heavier.