Temperature of the atmosphere decreases with height at the rate of about

1. 6.4°C per km
2. 4.6°C per km
3. 4.6°C per m
4. 4.6°C per cm

When temperature of the atmosphere rises, air …………… .

1. Contracts
2. Compresses
3. Expands
4. Dissipates

At what height is the troposphere above sea level?

1. 14 km
2. 16 km
3. 18 km
4. 12 km

The lowermost limit of this layer is tropopause

1. Troposphere
2. Stratosphere
3. Mesosphere
4. Thermosphere