Which of the following is the range of wavelengths corresponding to the maximum amount of radiation emitted by the sun?
A. 0.5 micrometre
B. 1 micrometre
C. 10 micrometres
D. 30 micrometres
Answer: A
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Why are ores so valuable?
A. They are sources of naturally occurring gold. B. They hold many clues to Earth's natural history. C. Metals can be efficiently extracted from them. D. They tend to occur in scenic mountainous regions.
What percentage of Earth's freshwater is locked up in polar ice caps?
A) 3% B) 70% C) 20% D) 30% E) 97%
Age determinations from radioactive-isotope decay methods are usually performed on a mineral crystal. Assume that a rounded grain of feldspar is plucked from a sandstone, analyzed, and determined to be 200 million years old
What does this tell you about the age of the sandstone? What other methods can be used to determine when the sand in the sandstone was deposited? What will be an ideal response?
____ caused a major tsunami wave in Alaskan coastal fjords
a. ?A stratovolcano eruption b. ?An undersea landslide caused by liquefaction of beach sediment c. ?A massive rockfall at one end of the fjord d. ?Calving of the ice at the end of a glacier e. ?A submarine landslide within the fjords