(a) The movement of water around Earth by changing phases

(b) Rainwater that is stored in aquifers

(c) Water in rivers, streams, oceans and rain

(d) The force between water molecules in liquid water

(e) The process where rivers, streams and the oceans become contaminated

(f) The waste water that contains soap, grease, food and body waste

(g) Water that contains calcium and magnesium ions

(a) Identify the processes A, B, C and D.

(b) What is the continuous circulation of water across Earth called?

(a) What is this type of water called?

(b) Name two detrimental effects of this type of water.

(c) What do we call water that has very little dissolved salts in it?

(d) There are two types of the water named in question a). Explain how you can remove the offending ions in each type.

(a) Why do you think bottled water is so popular?

(b) Where does bottled water normally come from?

(c) Explain how you would obtain distilled water.

(d) Where do you normally use distilled water?

(e) What is the difference between bottled water and distilled water?

(f) Would it be better for you to drink distilled water instead of tap water?

(a) Why is the town’s water supply taken from the river at P and not closer to the town?

(b) Why do you think there is such a big temperature difference between Q and R?

(c) At S, the river is becoming choked with water plants. Why do you think the plants are growing so fast in this section of the river?

(d) The plants at S would normally provide food for fish. But there are no fish in this section of the river. Why do you think this is so?