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

Environmental & Atmospheric Sciences

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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?

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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

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In 1994, the comet Shoemaker-Levy crashed with spectacular results into ________.

A. Jupiter B. Titan C. Venus D. Mars E. Saturn

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Energy from tides cannot be harnessed because it is too

A. concentrated. B. excessive. C. dispersed. D. All the choices are correct.

Environmental & Atmospheric Sciences