On a worldwide basis ________ provides the largest percentage of renewable energy.
A. wind
B. hydroelectricity
C. biomass
D. solar
Answer: C
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When the Kelvin wave hits the coast of South America,
A) the thermocline is at a much more shallow level as cold water is concentrated at the surface. B) the thermocline is found much deeper as warm water is concentrated at depth. C) the thermocline is at a much more shallow level as warm water is concentrated at depth. D) the thermocline is at a much more shallow level as cold water is concentrated at depth.
The global human population is expected to
A) grow faster and faster over the next century. B) crash in the next century. C) exceed 10 billion by 2100. D) begin to decrease by 2100.
In order to control flooding, levees are frequently constructed along the banks of rivers to confine flow to the channel. Given this, what happens to the flow velocity and erosive power of the stream during a flood, before the water overflows the levee?
a. Velocity increases because the width does not increase, and the erosive power increases. b. Velocity increases because depth does not increase, and the erosive power increases. c. Velocity decreases because the depth of the channel is significantly greater, and the erosive power increases. d. Velocity decreases because the width of the channel is significantly less and the erosive power decreases.
Which of the following would decrease the severity of air pollution in Los Angeles?
A. on shore breezes B. valley surrounded by mountains C. off shore breezes D. inversion conditions