Earth becomes ____ with increasing depth
a. more dense
b. less dense
c. liquid
d. enriched in silica and aluminum
e. depleted in iron and magnesium
a
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Why are some tropical waters unable to sustain life?
a. There is an addition of pollutants in many of these areas. b. There is a low level of dissolved oxygen due to temperature. c. There is a greater amount of carbon dioxide. d. There are more conservative components in these waters.
Is banded iron formation a chemical or detrital sedimentary rock? Explain. What will be an ideal response?
Erupting lavas generally have a temperature in the range of 700? to 1200?F. Indicate whether the statement is true or false
The seasonal migration of livestock between mountains and lowland pastures is
A) pastoral nomadism. B) transnomadism. C) transhumance. D) practiced mostly in the tropics. E) livestock ranching.