Hurricanes are powerful tropical storms with strong winds and heavy rain. This GCSE Geography quiz tests how and where they form, move and cause damage.
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You can find more about this topic by visiting BBC Bitesize - Extreme weather
A tornado is much smaller and is also called a whirlwind
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Further away from the equator, the seas never become warm enough to start a hurricane. The rising air must be rotating, any closer to the equator than 5 degrees and the coriolis force is too weak to cause rotation
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There is not as much warm moist air over land as there is at sea so there is a lot less energy to power the hurricane
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Where the sea surface temperature is 26°C or more, it is possible for a hurricane to form. Once a hurricane forms, it can travel long distances
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The strong winds of a hurricane create a bulge of water which is called a storm surge. In the case of New Orleans, the surge was about 6m. The flood defences were poorly constructed and failed to stop the surge from entering the city
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It is an area that is clear of clouds because it is where cold air is sinking downwards. Clouds only form from rising warm air that cools down at higher altitudes
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There are other reasons too such as higher literacy rates so populations understand the dangers and what they should do to stay safer during a hurricane, better hurricane survival education programmes and more sturdily-constructed buildings
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There is no link between earthquakes and hurricanes
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Hurricanes require rising air that contains a lot of moisture, warm air rises and can hold more moisture than cold air. Warm air over a warm sea can hold the greatest amount of moisture
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If you are caught outside in a hurricane, it would be difficult to walk, lighter people may not even be able to stand upright. The biggest problem would be avoiding being hit by flying debris - imagine even just a small object hitting you at a similar speed to a car driving along a motorway in the fast lane ...
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