Lake Opakoi is almost surrounded by mountains. In winter it is a very cold place. Thick snow covers the mountains. In summer it is sunny and warm – a good place to have a picnic and a swim. The water level in Lake Opakoi changes during the year.
Explain the cause(s) of the following changes:
In spring the lake is very full.
During the summer the lake level drops.
In winter the lake level is high.
