Condensation nuclei are :

1. impurities that support condensation.
2. water particles that help in precipitation.
3. droplets formed as a result of condensation.
4. droplets that fall to the ground.

Which of the following is NOT correct ?

1. Frontal rainfall: cyclones
2. Convectional rainfall: 4 o'clock showers
3. Cyclonic rainfall: mountains
4. Relief rainfall : mountain barriers

How is relative humidity determined?

Name four chief forms of condensation.