(i) What are 'doldrums'?

(ii) Why is it so called?

Name the region in which the following local winds blow:

1. Chinook
2. Mistral
3. Foehn
4. Loo

Give a reason for each of the following:

1. Roaring forties and furious fifties are found in the Southern hemisphere.
2. Low atmospheric pressure prevails over the circum polar region.
3. Cyclones are always followed by anticyclones

Distinguish between absolute and relative humidity.