"No-till" agriculture reduces soil erosion by
A. causing soils to dry out faster.
B. increasing sheetwash.
C. reducing rainsplash.
D. All of these choices are correct.
Answer: C
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An object will normally be a net radiator of energy when its temperature is
A) higher than its surroundings. B) lower than its surroundings. C) neither A nor B
Using the Periodic Table, what can you say about the element silicon (Si)?
A. it has 14 electrons in the outer shell B. it has 3 electron shells and 4 electrons in the outer shell C. it has 2 electron shells and 2 electrons in the outer shell D. it has 4 electron shells and 3 electrons in the outer shell E. None of these choices are correct.
Describe the circumstances that created the springs in Figure 3.32
What will be an ideal response?
Drawbacks to the use of coal-based alternative fuels include all of the following except
A. it will significantly reduce the life expectancy of coal reserves. B. it will increase demand for conventional crude oil. C. it will increase environmental problems already associated with the mining and burning of coal. D. its production generates large amounts of carbon dioxide.