Презентация Tornadoes

Tornadoes

• A tornado is a tube of very fast going round air that touches the ground. Wind inside the tornado spins extremely fast. A tornado can have wind speeds of over 320 kilometers per hour. But most tornadoes have wind speeds less than 180 kilometers per hour. That's why tornadoes are very dangerous.

• Tornadoes can occur worldwide but is more common in the United States. Other countries that often suffer from a tornado include Japan, Australia, South Africa, Uruguay, Canada. There are certain weather conditions that precede the disaster. For example, rain, strong wind, lightning and sometimes even hail or suspicious calm.

• Tornadoes cause a lot of damage to anything in their path. They are especially dangerous to people in cars or mobile homes. According to statistics nearly 60 people are killed by tornadoes every year.

• The record-breaking tornado by it’s damage and duration occurred in spring of 1925, in three states of the USA: Missouri, Illinois and Indiana. This disaster killed more than 600 people, while over 2000 were injured.