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Topic: 10 Things I bet you never knew

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10 Things I bet you never knew

1 Over 97 per cent of the Earth's water supply is contained in the oceans. Most of the rest is frozen solid in ice sheets and glaciers.

2 The average depth of the ocean is 3,800 metres which is approximately 12467 feet.

3 The Marianas Trench, off the coast of the Philippines, is one of the deepest parts of the ocean. It descends to 11,033 metres -- more than 2,000 metres deeper than the height of Mount Everest.

4 The oceans occupy nearly 71 per cent of our planet's surface.

5 The Antarctic ice sheet that forms and melts over the ocean each year is nearly twice the size of the United States.

6 The world's oceans contain nearly 20 million tonnes of gold.

7 More than 3.5 billion people depend on the ocean for their primary source of food. In 20 years, this number could double to 7 billion.

8. Ninety per cent of all volcanic activity occurs in the oceans.

9 The pressure at the deepest point in the ocean is more than 11,318 tons/sq m, or the equivalent of one person trying to support 50 jumbo jets.

10 The top 10 feet of the ocean hold as much heat as the entire atmosphere.

Source:http://www.jamaicaobserver.com/teenage/10-Things-I-bet-you-never-knew_7991621



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