What is a 20-year flood? What will be an ideal response?
Based on records of stream behavior through time, agencies determine how often a flood of a certain
size is likely to happen. For a 20-year flood, a flood of that magnitude is predicted to happen about
once every 20 years.
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A(n) ________ is a group of individuals capable of interbreeding
Fill in the blank(s) with correct word
Which is not a major factor in the width of a continental shelf?
A) The proximity to a plate boundary B) The speed of ocean currents C) Natural dams that allow sediment accumulation D) The number of rivers depositing new sediments
________ is also added to the atmosphere by the combustion of fossil fuels
A) Nitrate B) Argon C) Chroflourocarbon D) Carbon dioxide E) None of these answer choices are correct.
The Doppler radar uses the principle called Doppler ____ to measure the speed at which falling rain is moving horizontally toward or away from the radar antenna.?
a. ?signal b. ?radiance c. ?acceleration d. ?speedometer e. ?shift