In the process of a magma cooling and crystallizing, if the original melt contained large amounts of iron, why isn't quartz a ferromagnesian mineral?
What will be an ideal response?
Answer: As a magma begins to crystallize, early-forming minerals like olivine will remove iron from the melt and lock it away in solid crystals, thus preventing later minerals from using iron in their molecular structures.
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Plate divergence results in:
The theory that all living organisms are descendants of different life forms that existed in the past is called:
A) organic evolution. B) astrology. C) paleontology. D) plate tectonics. E) natural selection.
A person who, usually as a result of violent conflict is forced to leave their home is an ________ ________ ________
Fill in the blank(s) with correct word
Which of the following do climatologists predict will occur as the Earth continues to warm?
A. all of the answers listed here B. more frequent droughts C. higher evaporation rates D. more frequent heavy rain and snow events E. atmosphere will hold more water vapor