GeoActive Questions and Answers

Activities:
1. What percentage of the world's supply of water is fresh water?
A: Water covers 71 percent of the earth and 2.5 percent of all the water is fresh water which means there are only 1.775 percent of fresh water on earth.
2. Where is the world's supply of fresh water found?
A: Above 1.775 percent of fresh water, 1.42 percent is found in the form of ice on land, 0.3479 percent is found in groundwater and the soil and 0.0071 percent is found in the rivers and lakes.
3. Even though the supply of fresh water is abundant it is still a problem. Why?
A: Because the fresh water and people are not evenly given. What happens is that for example, in country 1, there are more fresh water than in country 2. But the problem is, country 2 demands more fresh water because of greater population. So this shows the fresh were unevenly distributed.
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.
A: As we move from the southern of Africa to the northern tip of Africa, we can find out that the rainfall is getting higher until the place between the equator and the Tropic of Cancer. From then on, the average annual rainfall goes under 250mm which is extremely low.
(b) Describe the changes in rainfall that occur as you move from the western to the eastern tip of Australia along the Topic of Capricorn.
A: As we move from the western to the eastern tip of Australia along the Tropic of Capricorn, we can find out that the rainfall is slightly getting higher and finally reaches over 2000mm, starting from under 250mm.
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?
A: South America seems to have a large amount of water available per person.
(b) Which parts of the world appear to have a small amount of water per person?
A: Europe seems to have a small amount of water per person.
6. Observe the diagram of water use.
(a) What are the main uses of water?
A: The main uses of water is agriculturing.
(b) Which uses have increased the most over the last century?
A: Reservoir losses from evaporation and seepage has increased the most over the last century.