Which of the following is an accurate statement about the frictional force?
A. It accelerates winds near the surface.
B. It is zero at the equator.
C. It varies depending on the nature of the Earth's surface.
D. It is roughly the same up to an altitude of 5 km.
Answer: C
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A coral reef found off the island of Andros in the Bahamas provides a home for many types of fish. These fish interact with other fish, with the coral structure, as well as with sunlight and water chemistry. Which term best captures the complexity that is occurring here?
A. ecosystem B. species C. organisms D. population
Air pollution in major cities of developing countries is
A. Not well understood B. Rapidly becoming less of a problem C. Usually negligible D. Responsible for extremely high rates of respiratory diseases E. Decreasing because of the use of scrubbers and other technologies
The Panthalassa Ocean eventually became the present-day _________ Ocean
a. Atlantic c. Arctic b. Indian
The most stable layer in terms of temperature and density is the mixed layer
Indicate whether the statement is true or false