Which of these materials is a mineral?
a. granite
b. coal
c. quartz
d. slate
e. schist
c
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Which of the following is not a problem associated with extracting mineral resources from the ocean?
a. Many of the mineral resources that are found in seawater are in low concentrations. b. This can be extremely expensive given current technologies. c. There might be ecological impacts associated with aquatic life. d. There might be disagreement as to who has legal access and rights to certain resources. e. There are no valuable mineral resources in the ocean.
Alluvial fans commonly occur in the marine environment
a. True b. False
In theory, what are free-market economies based upon?
a. The supply of products b. The consumption of products c. Pure competition d. Government policies
Using Figure 13.4 in your textbook, if comparing equal-weight blocks of each substance, which one would be smallest?
A) mantle B) continental crust (mostly granite) C) oceanic crust (mostly basalt) D) ocean (mostly water)