Tuff and volcanic breccia are both composed of a variety of igneous fragments. Their classification as either felsic, intermediate, or mafic therefore depends on the particular
A. thickness of each individual unit.
B. mineral content of each individual unit.
C. average grain size of each individual unit.
Answer: B
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The following list is a list of facts.1.permafrost in the arctic is melting 2.Greenland and Antarctic ice sheets are losing mass. 3.the area covered by the Arctic sea ice is getting smaller. 4.sea level has risen. A logical conclusion is that
A. the climate is getting warmer. B. the oceans are getting more acid. C. carbon dioxide is increasing. D. these facts are not related.
The most prominent structure in the ancient city of Ur was the stepped temple called the ________, which was built about 4,000 years ago
A) pyramid B) Great Pyramid C) Ziggurat D) cathedral E) Parthenon
What would happen to alpine glaciers in the Europe if average annual temperatures decreased?
A. They would decrease in size. B. They would stay about the same size. C. They would increase in size.
Why are lakes without outlets salty?
What will be an ideal response?