A finely crystalline or glassy igneous texture indicates that
A. the rock broke apart as it flowed.
B. the rock cooled slowly.
C. there was a lot of gas in the magma.
D. the rock cooled quickly.
E. the ash and pumice were hot and became compacted.
Answer: D
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The United States imports some minerals of which it has ample supplies and production exceeding current demands.
Answer the following statement true (T) or false (F)
Deformation under low stress, below yield strength, is often
A) elastic. B) plastic. C) irreversible. D) compressive.
A primary reason why land areas warm up more rapidly than water areas is that:
A) evaporation is usually greater on land. B) heat from Earth's interior warms the land. C) land absorbs more solar energy. D) land is a better emitter of energy. E) on land, all solar energy is absorbed in a shallow layer.
Where are high-level radioactive wastes currently stored in the United States?
A. Onsite at commercial power plants B. In secured landfills C. In artificial bedrock caverns D. On the sea floor