In terms of matter and resources, Earth is essentially a(n) ________ system; In terms of energy, Earth is a(n) ________ system
A) closed; open B) open; closed C) open; open D) closed; closed
A
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Of what value are the oceans in moderating climate change?
a. Oceans remove about 25% to 30% of the atmospheric carbon dioxide produced by humans. b. Oceans reflect sunlight back into space before the ultraviolet wavelengths are converted into infrared radiation. c. Oceans absorb about 40% of the methane out of the atmosphere that has been produced by rice paddies and livestock. d. Oceans help to reduce the level of water vapor in the atmosphere through condensation and transpiration. e. All of these answers.
Which of the following is not the name of a supercontinent?
A) Gondwana B) Laurasia C) Pangaea D) Rodinia E) Tethys
What is the main way that position of the continents can influence global sea level?
A) Clustering of continents near the poles causes the planet to bulge near the equator, causing sea level to rise since more of the equatorial area is oceanic. B) Continents near the equator receive higher amounts of rainfall. C) Continents at high latitudes provide a setting in which large ice sheets can form. D) Clustering of continents near the poles causes ocean temperatures to fall substantially.
Why are so few volcanoes mapped in the middle of the oceans?
A) The middle of the oceans corresponds with the middle of tectonic plates, so there are only hot-spot volcanoes there. B) Geologists cannot pinpoint the locations of many recently active seafloor volcanoes. C) There are only convergent plate boundaries under the ocean, which are less likely to have volcanoes than transform or divergent boundaries. D) There are only divergent plate boundaries under the ocean, which are less likely to have volcanoes than transform or convergent boundaries.