Wednesday, May 15, 2013

The Formation of Tornadoes



Thundercloud ផ្គររន្ទះ                                                    spin វិល


A tornado is created when warm, moist air rises from the ground and comes into contact with a mass of colder air at the bottom of a thundercloud. The rising air pushes against the colder air, and the rotation of the earth causes the air to spin, in much the same way that water in a sink spins as it goes down in a drain.
The pressure at the center of a tornado is much lower than that in the air surrounding the tornado. The low pressure creates a funnel in the middle of the tornado, which causes destruction by acting much like a vacuum cleaner and sucking up whatever is in its path.
 

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