The origin of the solar system began with a solar nebula that was:
a. initially hot, but later cooled and contracted
b. initially hot, but later cooled and expanded
c. initially cool, but later heated and contracted
d. initially cool, but later heated and expanded
c
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Which of the following statements about the greenhouse effect is false?
a. The amount of heat trapped in the troposphere depends on concentrations of greenhouse gases. b. The greenhouse effect is a new theory that explains the warming of the atmosphere. c. Heat trapped by greenhouse gases keeps the planet warm enough for life. d. The predominant greenhouse gases are water vapor, carbon dioxide, methane, and nitrous oxide. e. It has been confirmed by numerous lab experiments and measurements of atmospheric temperatures at different altitudes.
Which is characteristic of mid-oceanic ridges?
A. high heat flow B. basalt eruptions C. shallow-focus earthquakes D. All of these choices are correct.
Even though Japan is currently rethinking their nuclear energy policy, why did they choose to build all the nuclear power plants in the first place?
A) Japan has significant industrial energy needs and very little fossil fuel reserves. B) Japan can use seawater to cool their nuclear power plants. C) Air pollution concerns prompted Japan do build many nuclear power plants. D) Japan exports most of their refined fossil fuels so there isn't enough for domestic use. E) Japan is trying to help reduce global warming by following an energy policy that requires a large percentage of energy from nuclear sources.
Iceland is a good example of an island arc, formed from an oceanic-oceanic plate collision
Indicate whether the statement is true or false