Track 14

Track 14

1 glaciers

It is assumed that glaciers move slowly, but occasionally they have surges and move up to fifty times faster than normal.

2 salinity

The Dead Sea is famous for the salinity of its water.

3 humidity

The humidity in tropical areas can make you very tired.

4 kilometres

The oceans can reach depths of eleven kilometres in places.

5 pressure

Altitude sickness is due to a reduction in air pressure.

6 evaporation

Rain is mainly caused by evaporation from the oceans.

7 environment

We need to look after the environment around us.

8 biology

Biology is a branch of the natural sciences.

9 brightness

Our perception of the brightness of the sun changes with the seasons.