Wednesday 11 November 2009

Questions On Fresh Water

1. What percentage of the world's supply of water is fresh water?
2.5% of the world’s water is fresh.
2. Where is the world's supply of fresh water found?
Most of the fresh water is found in ice, but humans get it from the ground water.
3. Even though the supply of fresh water is abundant it is still a problem. Why?
The water is not evenly spread out across the world and humans do not handle it properly. Also if people us it properly not everyone can get to it.
4. Observe the map of the world average annual precipitation (opposite). a) Describe the changes in rainfall that occurs as you move from the Northern to the Southern tip of Africa.
At the Southern tip is a bit dry but when you get to the middle it rains more often, just past the middle the northern tip is just like the southern tip drier and does not rain that often. b) Describe the changes in rainfall that occurs as you move from the Western to the Eastern tip of Australia along the Tropic of Capricorn.
At the Western tip it is bone dry with hardly any rainfall but as you move closer and closer to the Eastern tip it just gets wetter and wetter.
5. Observe the map above of water availability per person. a) Which parts of the world appear to have large amount of water available per person?
Countries that are not overpopulated, they also have enough money to sustain their country and population. b) Which parts of the world appear to have a small amount of water per person?
Countries that are overpopulated and don not have enough money to give their whole population the fresh water that they need.
6. Observe the diagram of water use. a) What are the main uses of water?
Agricultural and industrial use the most water. b) Which uses have increased the most over the last century?
Agricultural has increased the most over the last century.

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