Which of the following primary energy sources is currently most consumed by humans?
A) nuclear power
B) oil
C) coal
D) natural gas
E) wood
Answer: B
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Which of the following is a correct example of global warming creating a positive feedback?
A) Ice has a higher albedo than water so replacing ice with water causes the surface to warm. B) Ice has a lower albedo than water so replacing ice with water causes the surface to warm. C) More water evaporating will create more low level clouds, causing the surface to warm. D) Less water evaporating will create more low level clouds, causing the surface to warm.
Most magma rises until it reaches a depth at which its density matches that of the enclosing
lithosphere. Indicate whether the statement is true or false.
In the middle latitudes of the Northern Hemisphere, surface winds tend to blow ____ and ____ around an area of surface low pressure
A) clockwise; inward B) clockwise; outward C) counterclockwise; inward D) counterclockwise; outward
________ influences the velocity of a river along with gradient.
A. Latitude of the river B. Direction of flow C. Chemistry of the water D. Channel shape and roughness E. Temperature of the water