What did Tuttle and Bowen observe in their experiment that helps geologists try to understand how magma is made?
What will be an ideal response?
Answer: The melting temperature of granite is much lower than that of peridotite. Partial melting in the presence of water begins at lower temperature as the pressure increases. This result also is seen for peridotite and is, indeed, a characteristic shared by all magmas. As pressure increases, more water dissolves into the magma, which means that magma can hold more water at high pressure than at low pressure.
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At 60 degrees north latitude, maximum solar energy would strike the top of the atmosphere on approximately
A) March 21. B) June 21. C) September 21. D) December 21. E) Groundhog Day.
The study of the origin and development of landforms is specifically called _______________
Fill in the blank(s) with correct word
Looking at a world map of temperatures, you would see that isotherms deflected toward the poles over seas are an indication of ________
A) horizontal currents B) diving currents C) warm currents D) cold currents E) none of the above
The so-called "winds of commerce" are the ________ winds
A) horse latitude B) Rossby wave C) trade D) monsoon E) westerly