Without the atmospheric greenhouse effect, the average surface temperature would be:
a. higher than at present.
b. lower than at present.
c. the same as it is now.
d. much more variable than it is now.
b
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Shale differs from mudstone in that
A. shale is visibly layered and fissile; mudstone is massive and blocky B. shale has larger grains C. shale has smaller grains D. There is no difference between shale and mudstone.
You are swimming with your buddies on a beach in the surf. You leave your cooler and supplies on the beach, and after a half hour you swim back to shore, but your stuff isn't there. You look along the beach and see your cooler 200 m down the beach. How did that happen?
What will be an ideal response?
Which of the following is a method that governments use to improve urban transportation?
A) Make some public buildings and some communities accessible only by public transportation. B) Give tax rebates to people who use only public transportation. C) Provide bicycle lanes on freeways. D) Designate lanes as carpool-only. E) Provide motorcycle lanes in the center of rail lines.
Thomas Malthus concluded that
A) population increased arithmetically while food production increased linguistically. B) the world's rate of population increase was higher than the development of food supplies. C) so-called "moral restraint" was producing lower crude birth rates. D) population growth was outpacing available resources in every country, according to algebraic calculations. E) crude birth rates must balance crude death rates.