MOUNTAINS ____ on Earth are mountains. Mount Everest in the Himalayas is ____ 8,484 metres. It takes ____ weeks to reach the top. Mont Blanc, ____ in Europe, is a baby at 4,807 metres.____ are volcanoes. Popocatepet1 in Mexico could kill millions of people. But not all mountains are on Iand.The Mid-Ocean Ridge system is ____ range in the world at 56,000 krn long, but it's underwater!

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