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Who- many people live in, usually Muslims, Indians and nomads.
What- Deserts are all extremely dry, and can be one of the harshest places on earth.
Where- Deserts can be found in 6 continents: Australia, America, Asia, Africa and Antarctica.
When- It hardly rains in deserts, they only get 200mm of rainfall each year.
How- they were formed then warm air currents meet cold seas.
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Who- Many animals live near rivers some are crocodiles, alligators, cranes and ducks.
Where- Rivers are located all over the world.
What- A river is a flowing stream of water flowing out to the sea.
When- It sometimes rains near rivers but not all the time.
Why- A river is there so it can get fresh water out to the sea.
How- They got there by inland lakes and creeks.
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Who- Climbers, tourists, farmers, animals, water authorities and Forestry companies may live or work near mountains.
Where- Mountains are located all over the world, North America, South America, Asia, Antarctica and Europe.
What- A mountain is a large landform made by rocks, plants and trees.
When- It usually snows in winter near mountains.
Why- Mountains are there because of small erosions.
How- Mountains were formed over millions of years of years by small erosions.
http://www.youtube.com/watch?v=CLf0O6YfOv4&feature=related
Link To Video