terça-feira, 2 de novembro de 2010

Tornados

Author: Judit Jekkel
Source: www.englishexercises.org

                                                               
 
Watch the video and fill in the missing information in the following table.

Speed
Up to  miles per hour
A billion dollars
Tim Samaras’ job
Electronics 
Number of probes in his van
 of one probe
45 pounds
The probes measure
Biometric 
 speed
Wind 
Temperature
Cameras in the probes
Video
The name of the area in the US where tornadoes mostly occur
Tornado 
Starting date of the experiment
 3rd
Distance that they covered
 miles
Number of states visited
Time that Tim needs to place a probe
Less than 10 

Watch the video again and decide whether the following statements are true, false or not mentioned.
 
1 Tornadoes are one of the most understood natural phenomena. 
2 Tim Samaras works on his own.  
3 Tim has never been able to get data from the centre of a tornado. 
4 A probe has been designed by Nat Geo workers.  
5 Storm chasers try to put their measuring devices in the path of tornadoes.
6 Tornadoes are formed when there is warm humid air and cool dry air in the atmosphere. 
7 All tornadoes look the same.  
8 Tornadoes usually hit and form very fast.  
9 Strom chaser are often hit by tornadoes. 
10 The tornado has left some marks on the probe.  
11 The pressure inside a tornado never drops.  
12 They have managed to get images from the centre of the tornado.

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