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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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The following words have been removed from a text about tornadoes (source: http://www.noaawatch.gov/themes/severe.php). Fill in the crossword using them.
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Tornadoes - Although tornadoes occur in many parts of the world, they are found most frequently in the 1 �_.....
- A tornado is a violently rotating column of air extending from a thunderstorm to the 2__.
- Tornadoes cause an 3 ___ of 70 fatalities and 1,500 injuries in the U.S. each year.
- The 4 ___tornadoes have rotating winds of more than 250 mph.
- Tornadoes can be one mile 5 ___ and stay on the ground over 50 miles.
- Tornadoes may appear nearly transparent until dust and 6 ___ are picked up or a cloud forms within the 7 �___. The average tornado moves from southwest to northeast, but tornadoes 8 ___ been known to move in any direction.
- The average forward 9 ___ is 30 mph but may vary from nearly stationary to 70 mph.
- Waterspouts are tornadoes which form over warm water. They can move onshore and cause 0 ___ to coastal areas.
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