Why are there tremendous amounts of erosion when it rains in a desert?
What will be an ideal response?
Answer: Rainfall usually comes out of fierce thunderstorms which have great rainfall intensities making great potential for runoff. Many surfaces have little soil, are impervious, and so accelerate the erosion capability of the runoff. Finally, there is little vegetation to slows and encourage infiltration at the expense of runoff.
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A good heat conductor is a
A. poor insulator. B. good insulator. C. neither of these D. not enough information
Most urbanization has taken place during the last hundred years
Indicate whether this statement is true or false.
What is one of the newest techniques employed to measure tides?
a. simple drogues b. pressure-sensing transducers c. drift bottles d. satellites to measure Earth's magnetic field e. acoustic Doppler profilers
Ozone is ________. In the upper atmosphere it ________. a. O3; is a pollutant
b. O2; absorbs ultraviolet energy c. O3; absorbs ultraviolet energy. d. O2; is a pollutant.