Natural disasters

Topics: Tornado, Tropical cyclone, Earthquake Pages: 7 (2209 words) Published: October 7, 2013
 NATURAL DISASTERS Whitewater Rafting
Whitewater rafting enthusiasts row or paddle rubber rafts down turbulent, fast-running rivers. Rafting trips can be short day trips or longer trips that involve camping alongside the river at night. Encarta Encyclopedia

Energy Productions/The Image Bank

Amazon River
The Amazon River in South America is one of the longest rivers in the world. Only the Nile River in Africa is longer. Encarta Encyclopedia
Claudia Parks/The Stock Market
Parts of a River
Encarta Encyclopedia
© Microsoft Corporation. All Rights Reserved.
Earth Extremes Tour
Can you name the world’s tallest mountain, longest river, and deepest lake? Click on the map to learn about Earth’s most extreme places! Encarta Encyclopedia
© Microsoft Corporation. All Rights Reserved.

Thames River, London
The Thames River in London is the most important river in England. It is the main source of London’s water supply. Encarta Encyclopedia
Sandy Stockwell/Corbis

Steamboat
Steamboats used to be an important way to travel and to ship goods, especially on the Mississippi and Missouri rivers. This boat is a modern copy of a 19th-century steamboat. Encarta Encyclopedia
David R. Frazier/Photo Researchers, Inc.

Colorado River in the Grand Canyon
The Colorado River runs along the bottom of the Grand Canyon in Arizona. The river created the canyon over millions of years by slowly wearing through rock. Encarta Encyclopedia
David Muench/Corbis

St. Paul’s Lutheran school
Six Sparrows
Emmanuel Delali Fayorsey Floods A flood is an overflow of an expanse of water that submerges land.[1] The European Union (EU) Floods Directive defines a flood as a covering by water of land not normally covered by water.[2] In the sense of "flowing water", the word may also be applied to the inflow of the tide. Flooding may result from the volume of water within a body of water, such as a river or lake, which overflows or breaks levees, with the result that some of the water escapes its usual boundaries.[3] While the size of a lake or other body of water will vary with seasonal changes in precipitation and snow melt, it is not a significant flood unless such escapes of water endanger land areas used by man like a village, city or other inhabited area. Floods can also occur in rivers, when flow exceeds the capacity of the river channel, particularly at bends or meanders. Floods often cause damage to homes and businesses if they are placed in natural flood plains of rivers. While flood damage can be virtually eliminated by moving away from rivers and other bodies of water, since time out of mind, people have lived and worked by the water to seek sustenance and capitalize on the gains of cheap and easy travel and commerce by being near water. That humans continue to inhabit areas threatened by flood damage is evidence that the perceived value of living near the water exceeds the cost of repeated periodic flooding.

Earthquake An earthquake (also known as a quake, tremor or temblor) is the result of a sudden release of energy in the Earth's crust that creates seismic waves. The seismicity, seismism or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time. Earthquakes are measured using observations from seismometers. The moment magnitude is the most common scale on which earthquakes larger than approximately 5 are reported for the entire globe. The more numerous earthquakes smaller than magnitude 5 reported by national seismological observatories are measured mostly on the local magnitude scale, also referred to as the Richter scale. These two scales are numerically similar...
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