what causes tornadoes

by : jayla kelly

why i chose this topic

I chose this topic because I take a interest in tornadoes. they happen were I live so I thought that it would be important to learn more about them.

facts


A tornado that occurs over water is often called a waterspout

Tornadoes are sometimes called twisters.

Most tornadoes travel a few miles before exhausting themselves.

In the southern hemisphere tornadoes usually rotate in a clockwise direction

Extreme tornadoes can travel much further, sometimes over 100 miles (161kilometres).

Basements and other underground areas are the safest places to seek refuge during a tornado. It is also a good idea to stay away from windows.The Tri-State Tornado was the deadliest tornado in US history, killing 695 people

mla style

A tornado is a violent rotating column of air extending from a thunderstorm to the ground. The most violent tornadoes are capable of tremendous destruction with wind speeds of up to 300 mph. They can destroy large buildings, uproot trees and hurl vehicles hundreds of yards. They can also drive straw into trees. Damage paths can be in excess of one mile wide to 50 miles long. In an average year, 1000 tornadoes are reported nationwide

( http://www.weatherwizkids.com/weather-tornado.htm )

this website told me about what is a tornado it told the miles it goes but it didn't tell me what causes the tornado are what color it is are how long does the tornado least and what times does it least and what make it start up .



A tornado is a rotating column of air extending from a thunderstorm to the ground. Tornadoes are capable of 250 MPH wind speeds, cutting a swath of destruction in excess of one mile width and dozens of miles in length.
If you see a dark, greenish sky or a wall cloud and hail, you might be getting a tornado. If you have something that sounds like a freight train, you definitely are.

( http://www.science20.com/news_articles/what_causes_tornadoes )

this tell me about mph the wind speed and the mile and width and dozens of miles in the length and how dark it is the greenish sky and wall cloud and hail and the tornado

sound freight train when it is coming Once a tornado has formed, it follows a predictable life cycle. First, the mesocyclone(rotating air), along with the rear flank downdraft( RFD), starts moving towards the ground. A small funnel appears to build up at the bottom of a wall cloud. As the RFD reaches the ground, the surrounding dirt rises up, causing damage even to heavy objects. The funnel touches the ground immediately after the RFD, forming a tornado.

( http://www.universetoday.com/75695/how-do-tornadoes-form/ )

this tell me about frd and the heavy objects the funnel touches the ground immediately after the rfd and it tells me about how the tornado is forming the surrounding dirt rises up first the moesocyxlone rotating air





What Causes Tornadoes