When soil is eroded from farmland,
A. new soil quickly forms replacing that which is lost.
B. the nutrient-rich topsoil is least affected.
C. crop yields and crop nutritional quality may be reduced.
D. All of the choices are correct.
Answer: C
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In bombarding atomic nuclei with proton "bullets," the protons must be accelerated to high energies to make contact with the target nuclei
A. because the target nuclei are so small. B. because the target nuclei are positively charged. C. in order to penetrate through the electrons that surround each target nucleus. D. because the target nuclei are negatively charged.
Why are fisheries heavily impacted by ENSO events?
a. Upwelling ceases b. Nutrient-rich currents are interrupted when the trade winds shift c. Low pressure systems create downwelling events rather than the normal upwelling d. Rise in sea level effects migration patterns
When stable air is forced to lift as it passes over a mountain range, the air may become saturated and condensation may occur. In this case, the air is
A) stable. B) unstable. C) conditionally unstable.
Which of the following will be accompanied by a decrease in elevation?
A. moving from oceanic crust to continental crust B. increasing the thickness of the lithosphere C. gaining crustal material, such as by deposition D. compressing the crust from the sides