What materials make up Earth's core?
A) Perovskite and silica
B) Iron and nickel
C) Olivine and pyroxene
D) Sulfur and aluminum
Answer: B
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Why do we want to limit the amount of ozone in the lower troposphere but protect ozone in the lower stratosphere??
Fill in the blank(s) with the appropriate word(s).
What substance makes ion migration easier in the later stages of magma crystallization, which allows abnormally large mineral crystals to form and create pegmatites?
A) Water B) Oxygen C) Silica D) Iron
Snow becomes glacial ice through a process of ____
a. evaporation and precipitation b. freezing and evaporation c. precipitation and refreezing d. melting and refreezing
The precipitation in Mediterranean climates
A) decreases with latitude. B) comes primarily from local convection over heated surfaces. C) is confined to winter in large part because of the nearby presence of subtropical high pressure systems in summer. D) is affected very little by mid-latitude cyclones.