The potential energy of Earth when orbiting the Sun is greatest when
A. approaching the Sun.
B. at its greatest distance from the Sun.
C. receding from the Sun.
D. closest to the Sun.
Answer: B
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Which statement best illustrates the "tragedy of the commons?"
A. A factory pollutes a river as much as the law allows. B. Some levels of pollution are life threatening. C. Some activities harm the environment, but others do not. D. Irrigated cropland can be ruined by salinization. E. Cropland can decrease biodiversity.
How does the addition of water cause melting?
A. it heats the rocks B. it decreases the pressure on the rocks C. it changes the location of the liquid-solid boundary D. it increases the temperature while decreasing the pressure
Answer this question that relates to the sea level change graph below.
Based on the graph, what would you predict to find today on the continental shelf off the coast of Maine?
A. Deltas about 11,000 years old and modern canyons B. Canyons and deltas about 11,000 years old C. Canyons about 11,000 years old and modern deltas D. Modern canyons and deltas
Two inland cities are located at the same latitude and within 50 km of each other. City A has an annual mean that is 12°C lower than City B. What control is the most likely cause for the much lower annual mean at City A?
What will be an ideal response?