Activities in Geoactive book

1. What percentage of the world's supply of water is fresh water?
Answer: 2.5 percent of water on earth.

2. Where is the world's supply of fresh water found?
Answer: 2% is in form of glaciers, 0.49% is in the ground, and 0.01% is found in atmospheres, rivers and lakes.

3. Even though the supply of fresh water is abundant it is still a problem. Why?
Answer: Because water is a fixed resource. The amount of water can't be increased or decreased, while the population is growing fast.

4. Observe the map of world average annual precipitation (opposite).
(a) Describe the changes in rainfall that occur as you move from the southern to the northern tip of Africa.
Answer: As moving on from the tropic of cancer where the rainfall is extremely low, you can see the amount of rainfall raising.

(b) Describe the changes in rainfall that occur as you move from the western to the eastern tip of Australia along the Tropic of Capricorn.
Answer: You can see that as moving on to the eastern tip, the water drops suddenly about at the middle of australia, and rise again at the tip.

5. Observe the map above of water availability per person.
(a) Which parts of the world appear to have a large amount of water available per person?
Answer: South America seems to have no problem to accessing water.

(b) Which parts of the world appear to have a samll amount of water per person?
Answer: Europe seems to have small amount of water per person.

6. Observe the diagram of water use.
(a) What are the main uses of water?
Answer: The water is mainly used for agriculturing.

(b) Which uses have increased the most over the last century?
Answer: Reservoir losses from evaporation and seepage seems to have risen the most.