What is thought to be the cause of drought conditions over the past decade in the Southwestern United
States?
a. Warmer sea-surface temperatures in the Pacific Ocean
b. Increased rain shadow effect due to uplift of the Sierra Nevada
c. A decrease in the thickness of the ozone layer
d. Deforestation in the Pacific Northwest from logging
e. Dust storms in China causing global dimming
A
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A rock is thrown upward at 50° with respect to the horizontal. As it rises, its vertical component of velocity
A) increases. B) remains unchanged. C) decreases.
What alternative to fossil fuels is the most promising to meet the world's needs?
a. methane hydrate
b. nuclear power c. wind power d. tidal power e. solar power
Which of the following is a provision of the current Agricultural Adjustment Act?
A. distribution aid B. plant hormones C. land replenishment D. forestry conservation programs
What is dark matter and why are scientists looking for it?
What will be an ideal response?