Doubling time is
A. the time it takes for a woman to bear two children
B. the number of years it will take for a population to double in size
C. the time before the birth rate will fall
D. the number of years a person is expected to live
B. the number of years it will take for a population to double in size
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Briefly explain why sand is moved by wind before clay and silt during wind erosion. What will be an ideal response?
Desert climates often experience significant changes in temperature from the warmest temperature of the day to the coldest temperature of the day. Sometimes there is more change in temperature on a daily basis than winter to summer
Indicate whether the statement is true or false
In 1994, the comet Shoemaker-Levy crashed with spectacular results into ________.
A. Jupiter B. Titan C. Venus D. Mars E. Saturn
Energy from tides cannot be harnessed because it is too
A. concentrated. B. excessive. C. dispersed. D. All the choices are correct.