What valuable commodity has yet to be commercially mined from ocean sediments?
A) Natural gas
B) Gravel
C) Diatomaceous earth
D) Manganese nodules
D
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Which of the following is NOT true about solar energy?
A) One can find solar panels for sale in the bazaars of Morocco. B) Solar energy is often a first choice in remote locations. C) Solar heating is used to provide hot water in places like Israel and Japan. D) Solar power is widely used in the United States, providing over 20 percent of the electricity. E) Passive solar energy systems increased in the nineteenth century with glass windows.
The stratosphere ____.
A. is where atmospheric brown clouds form B. has more water vapor than the troposphere C. is where most weather occurs D. is characterized by temperatures that decrease with increasing altitude E. contains the ozone layer
A cross-bedded sandstone is formed when ________.
A. cold water and hot water mix B. the environment of deposition switches from quiet to dynamic C. a current quickly deposits it sediment load D. sand moves as a migrating ripple or dune E. water dries up on a muddy surface
What types of plate boundaries are on the Pacific and Atlantic shores of South America?
