Planet Earth

Planet Earth

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 Giant Meteorites

About 500 meteorites reach Earth every year. Many fall in the sea and in unpopulated areas and are never seen.

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 Largest Deserts

Deserts cover about a quarter of the world's land area. They range from extremely arid and barren sandy deserts, through arid to semi-arid.

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 Mountain Ranges

A mountain is a land that rises 300m or more above its surroundings and a mountain range is a continuous chain of mountains...

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 Islands

An island is a piece of land surrounded by water. Australia is so large it is a continent, not an island; otherwise it would rank first.

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 Geysers

Geysers are hot springs...

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 The Seven Continents

The Americas are named after Amerigo Vespucci (1451-1512), explorer with Christopher Columbus. Africa was was the name of a Roman province...

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 Lowest Places

The shore of the Dead Sea is the lowest exposed ground below sea level, but the sea bed is lower still...

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 Longest River

In 2006 a British-New Zealand "Ascend the Nile" team completed a journey from the mouth to the source of the river. By using Global Positioning they measured their journey and came up with a total length 107km longer than the official figure.

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 Greatest Waterfalls

The flow of many waterfalls varies according to the season, and some have been reduced by...

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 Greatest Rivers

The volume of water flowing from the mouth of a river varies according to a season determines a river's status...

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 HIGHEST WATERFALLS

Waterfalls form when a river or stream passes over a drop from one level to another, often where softer rocks are eroded faster than harder ones. The drop is the distance from the top to the bottom of the waterfall.

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 THE GREAT LAKES

The Great Lakes are a group of five freshwater lakes in North America on the border between the USA and Canada

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 LONGEST GLACIERS

The Lambert--Fisher Glacier is the longest in the world and was only discovered...

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 LAKES

Some people think that Lake Michigan and Lake Huron are one lake...

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 LONGEST COASTLINES

The coastline of Canada, including all its islands, is more than 6 times as long as the distance round the Earth at the Equator...

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 WAVE HEIGHT SCALE

The wave height scale describes the sort of waves that sailors might meet at sea. Wave height varies according to wind speed. High waves can be very dangerous, especially to small boats.

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 TSUNAMI

The word tsunami comes from the Japanese tsu

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 OCEANS AND SEAS

More than 70% of the planet’s surface is occupied by oceans - the Pacific Ocean alone is more than 25% larger than the planet’s entire land area. Smaller divisions of some oceans are named as seas.

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 DEEP-SEA TRENCHES

DEEP-SEA TRENCHES

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