Mercury's surface is heavily cratered due to
A. no volcanism.
B. lack of erosion.
C. little to no atmosphere.
D. All of these choices are correct.
Answer: D
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Ozone (O3) forms naturally in the____________________when atomic oxygen (O) combines with molecular oxygen (O2) in the presence of another molecule
Fill in the blank with correct word.
When did the harvesting of commercial whale species cease?
a. When the International Whaling Commission formed b. When there were substitutes for the products produced from whales c. When the hunting of whales became uneconomical d. CITES- Convention on the International Trade of Endangered Species
Critical Thinking
Which two terrestrial ecosystems in the accompanying figures produce the least kilocalories of energy per year?
What will be an ideal response?
Why is plastic not a mineral?
a) it is not solid. b) it is not natural. c) it is not chemically homogeneous.?