WEATHER HAPPENINGS AND CAUSES 



49 



The hurricane differs from the tornado chiefly in 

 that it is a much larger mass of whirling air and gen- 

 erally moves more slowly and over a greater distance. 

 Great walls of water are built up as the hurricane 

 moves along over an ocean or gulf. These travel more 

 rapidly than the storm and reach coast cities several 



Van Buskirk and Smith, The Science of Everyday Life, 

 Chap. 6 



Watkins and Bedell, General Science for Today, Chap. 3 



Webb and Beauchamp, Science by Observation and Experi- 

 ment, Unit 7 (part) 



Wood and Carpenter, Our Environment: How We Adapt 

 Ourselves to It, Unit 2 



Courtesy J'aylor Instrument Company 



FIG. 79. THKEE VIEWS OF A TORNADO 



hours ahead of the storm proper, sometimes resulting 

 in much damage. 



The U. S. Weather Bureau performs a great service 

 when these storms develop, as it issues storm warn- 

 ings to shippers, vessels, and cities on the coast. From 

 the data which it collects it is able to foretell the path 

 of the storm and predict when it will reach a certain 

 point, thus allowing cities to prepare and protect 

 themselves as much as is possible. In a recent storm 

 one of the larger Florida cities had its relief work 

 thoroughly organized several hours before the storm 

 broke. 



Hurricane-like storms which occur over the Pacific 

 and Indian oceans are called typhoons. 



REFERENCES FOR FURTHER STUDY 



Texts 



Caldwell and Curtis, Science for Today, Chap. 13 

 Clement, Collister, and Thurston, Our Surroundings, Chap. 9 

 Hunter and Whitman, Science in Our World of Progress, pp. 



65-69 

 Lake, Harley, and Welton, Exploring the World of Science, 



Chap. 10 

 Picper and Beauchamp, Everyday Problems in Science, Unit 



3 



Powers, Neuner, and Bruner, This Changing World, Unit 2 

 Skilling, Tours through the World of Science, Tour 3 



Special references 



Barber, First Course in General Science 

 Brooks, Why the Weather? 

 Meister, Water and Air 



WHAT YOU SHOULD AIM TO ACQUIRE FROM 

 THIS STUDY 



1. An understanding of the cause of local storms 

 and thunderstorms. 



2. An understanding of the cause of tornadoes and 

 something of their nature. 



3. Something of the hurricane and its causes. 



TEST OF MASTERY OF THE TOPIC 



In your notebook complete the statements, answer the 

 questions, and comply with the instructions. 



1. From which cloud types do storms most frequently 

 come? 



2. Thunderstorms most frequently form in the (west, 

 east) portion of a low-pressure area. 



3. A waterspout is a (tornado, hurricane) formed 



over water. 



4. Explain the difference between a hurricane and a 

 tornado. 



5. Explain the common misconception of cyclone. 



6. Houses and other buildings appear to explode and the 



walls fall outward in a tornado because the on the 



outside is greatly by the passing of the funnel cloud. 



7. "Centrifugal" means 



