What percentage of the earth's atmosphere does O2 comprise? w) 75% x) 50% y) 21% z) 32% Answer : ANSWER: Y -- 21%...
The continental shelves comprise what percentage o the Earth's total land area? w) 38 percent x) 28 percent y) 18 percent z) 8 percent Answer : ANSWER: Y -- 18 PERCENT...
Of the energy used in the United States, about wha percent is provided by hydroelectric power? w) 4% x) 20% y) 50% z) 75% Answer : ANSWER: W -- 4%...
Which of the following is the approximate ratio of the area of the continents to the area of the earth's oceans? w) 2:1 x) 1:1 y) 2:5 z) 1:10 Answer : ANSWER: Y -- 2:5...
Which of the following is TRUE of an earthquake's epicenter and focus? w) they are the same x) the focus is above the epicenter y) the epicenter is at the earth's surface z) the focus is at the earth's inner core Answer : ANSWER: Y -- THE EPICENTER IS AT THE EARTH'S SURFACE...
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