6 water questions pg.227

1. What percentage of the world's supply of water is fresh water? Answer: Only 2.5 percent of the worlds water is fresh water.
2. Where is the world's supply of fresh water found? Answer: The worlds fresh water comes from lakes, rivers, the atmosphere, the ground and some water is frozen.
3. Even though the world's supply of fresh water is abundant it is still a problem. Why? Answer: Water availability is a problem because many places have more water than other places. For example Greenland has a large water availability per person because there is probably a lot of frozen water there.
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: When you begin there is a large assortment of rainfall amounts. As you start to move north all of the dryer ratings start to disappear but as you keep moving up ward there is steep plunge and Africa doesn't seem so lush anymore.
(b) Describe the changes in rainfall that occur as you move from the western eastern tip of Australia along the Tropic of Capricorn. Answer: At the western tip it's pretty dry. As you start to move eastern it's still pretty dry but after a while it gradually starts to rain more. Until when your at the end where it rains day and night.

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: The places on earth which receive quite a bit of rain are Brazil, Indonesia, Southern China and a small part of Africa.
(b) Which parts of the world appear to have a small amount of water available per person? Answer: The places on earth that don't receive much rain are Greenland, Northern Africa and an area of Russia.

6. Observe the diagram of water use.

(a) What are the main uses of water? Answer: During the 20th century the main use of water was for Agricultural needs.
(b) Which uses have increased the most over the last century? Answer: There was a steep ascend in the 20th century for Reservoir losses from evaporation and seepage.