Which of the following best explains why continued warming of the Arctic is expected to greatly accelerate the rate of global warming?
A. reversal of the Gulf Stream and sea level rise
B. loss of sea ice and thawing of gas hydrates
C. sea level rise and thawing of gas hydrates
D. slowing of the Jet Stream and loss of sea ice
E. reversal of the Gulf Stream and slowing of the Jet Stream
Answer: B
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Which of the following is a result of clearing forests for agricultural purposes?
A) Biodiversity is increased because croplands attract insect pests and birds. B) Water runoff is decreased because croplands tend to absorb more water than forests. C) Crop productivity is greatly increased because of the rich soil. D) Soil erosion is increased because deforestation and tilling remove the vegetative cover.
At what time of day is the relative humidity normally at a minimum?
a. when the air temperature is highest b. just before sunrise c. about midnight d. when the air temperature is lowest e. at sunset
Orographic lifting is related to mountain barriers, and it is often associated with ________
A) desert conditions on both sides of the mountains B) excessive rainfall on both sides of the mountains C) desert conditions on the leeward side of the mountains and excessive rainfall on the windward side D) desert conditions on the windward side of the mountains and excessive rainfall on the leeward side.
The planets are "wanderers" in the night sky because they move relative to the stars. However, there movement is limited to the plane of the solar system, which is disk shaped
So relative to the celestial coordinate system, how do the planets actually move across the sky? A) They move along the celestial equator. B) They follow wobbling paths related to the precession of equinoxes. C) The move perpendicular to the celestial equator. D) The move along the zodiac.