What is the Enhanced Fujita scale? Into what category do most tornadoes fall?
What will be an ideal response?
Answer: The enhanced Fujita scale is a widely used system for ranking tornado intensity. Tornadoes fall into six levels of intensity, with each assigned a particular EF-value ranging from 0 to 5. Fujita values are determined by trained observers who assess a tornado's impact on any of 28 categories of natural objects or built structures (softwood trees, service station canopies, motels, small barns, single-wide mobile homes, and so on) called damage indicators. The observers then assign a numerical value to represent the degree of damage to each damage indicator. A certain minimum wind gust speed lasting 3 seconds or longer is then assumed to create any particular degree of damage to a damage indicator, and this is translated to an EF value. In the United States, the 69% of tornadoes fall into the weak category, which includes EF-0 and EF-1.
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Latin America and the Caribbean as used in this text include the country of Mexico
Indicate whether the statement is true or false
If everyone on Earth eliminated meat from their diets, there would be
A) increased demand for fossil fuels. B) increased pollution of waterways. C) increases in avian flu and Salmonella poisoning. D) a great surplus of grains.
Some geologists hypothesize that the tug and pull of lunar tidal forces are strong enough to trigger volcanic eruptions and earthquakes. Explain how you think this might happen. How would you test your hypotheses and what data would you need?
What will be an ideal response?
What type of slope failure is shown in this figure?
A. debris flow B. rock fall C. creep D. rock avalanche E. rotational slide