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Q43: Mid-oceanic ridges contain the oldest rocks in
Q44: Which of the following is NOT a
Q50: Concerning natural vegetation, which of the following
Q69: Earth's diameter is _ kilometers.<br>A) 13<br>B) 130<br>C)
Q84: Which of the following is NOT a
Q93: The birth of the solar system occurred
Q121: Animals subsisting on smaller animals are called
Q150: The mobility of animals makes them, as
Q152: _ is an area of extensive flood
Q155: Air within the soil is usually highly