During ice ages, the ice sheets were thickest and most wide spread in
A) the southern hemisphere.
B) the northern hemisphere.
C) Europe, and especially Russia.
D) the south pole.
Answer: B
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Which of the following statements about tar sands is true?
A) Most of Canada's petroleum reserves are in the form of tar sands. B) Most of the petroleum reserves in North Dakota are in the form of tar sands. C) Hydrofracking is used to extract oil from tar sands. D) Deposits of tar sands are generally found in sandy deserts such as the Arabian Desert in the Middle East.
Explain at least three processes that happen to light from the sun as it reaches the surface of the ocean
When did large numbers of fossils first appear in the geologic record?
A. About 500 million years ago B. About 5 billion years ago C. About 5000 years ago
What type of deformation is shown in this photograph?
A. internal strain of the rock B. columnar joints C. rotation D. displacement