Pacific ocean plate moving 5 centimeters a year...how old will the island rock be when it begins to submerge into the trench
a) 1 mill
b) 5 mill
c) 100 mill
d) 1 bill
Ans: c) 100 mill
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How many moles of H2 bonds are broken if you react nitrogen with hydrogen according to the following reaction? N2 + 3H2 ? 2 NH3
A) 6 B) 2 C) 3 D) 1 E) 8
Judge the following sentence according to the criteria given below. Grains are easier to move in water than air because the grains effectively weigh less in water than in air
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct but the reason is incorrect. D) The assertion is incorrect but the reason is correct. E) Both the assertion and the reason are incorrect.
Papua New Guinea's greenhouse gas emissions are less than that of New Zealand due primarily to the fact that
A) they have far fewer people. B) they have taken strict measures to reduce the use of fossil fuels. C) they are participating in a cap and trade program. D) there are far fewer livestock.
The Milankovitch cycles cannot entirely explain recent global warming trends because:
A) no data have been found to support their influence on Earth's climate. B) they operate on a very long time scale and cannot address shorter term cycles. C) they were disproved in the 1980s. D) they address cycles in precipitation only.