Multiple choice question.

Which one of the following process is responsible for transforming liquid into vapour?

Multiple choice question.

Which one of the following is the most important constituent of the atmosphere for human beings?

Multiple choice question.

The air that contains moisture to its full capacity:

Multiple choice question.

Which one of the following is the highest cloud in the sky?

Answer the following questions in about 30 words.

(i) Name the three types of precipitation.

(ii) Explain relative humidity.

(iii) Why does the amount of water vapour decreases rapidly with altitude?

(iv) How are clouds formed? Classify them.