IMO Practice Test — A Journey through States of Water

Two wet handkerchiefs are hung up; one is spread out and one is folded. The spread-out one dries faster because evaporation is faster with a:

A glass of cold water 'sweats' on the outside on a humid day. This shows the air contains:

The water you drink today might once have been ocean water. This is possible because the water cycle:

In very cold places, precipitation often falls as:

Cutting down too many trees can reduce local rainfall partly because trees add water vapour to the air through:

A farmer switches from flooding the field to drip irrigation. The main benefit is that he: