Introduction to Water Systems (SL IB Environmental Systems & Societies (ESS))

Complete the following sentences using the three figures provided below:

Freshwater makes up approximately __________ of the Earth’s water storages. The remaining water is saline.

Of this freshwater, approximately __________ is stored in the ground as groundwater. Most of the remaining water is locked up in the planet's glaciers and polar ice caps.

Of the remaining accessible, liquid surface freshwater, approximately __________ is found in the planet's rivers.

Figures:

1%

3%

30%

Outline what is meant by the term surface run-off.

Explain how surface run-off is generally affected by agriculture.

Define aquifer.