A tornado that does devastating damage and has estimated wind speeds of 300 km/hr (186 mph) would be ranked as an:
A) EF-3. B) EF-4. C) EF-2. D) EF-5.
B
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If surface mines tend to cause greater environmental impacts, why are they used?
A) Surface mines require the excavation of less rock. B) Cyanide is not required to process ore from a surface mine. C) Surface mines are more economical. D) Subsurface mines are more hazardous to miners.
Which of the following is a characteristic of intensive agriculture?
A) Most work is done by hand. B) Plots of land are very small. C) Physiological density is high. D) It is practiced mostly in river valleys and irrigated fields in the middle latitudes. E) All of the above
Major soil components include inorganic matter, organic material, water, and ______________
Fill in the blank(s) with correct word
Closely spaced isobars indicate high wind speeds
Indicate whether the statement is true or false