What is the ultimate source of food for animals living around deep-sea hydrothermal vents?
A. bacteria that break down hydrogen sulfide
B. sunlight and photosynthesis
C. the decay of creatures that float on the ocean surface and settle to the bottom
D. nuclear energy from the heated uranium-rich rocks
Answer: A
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According to the IPAT model, which of the following would most likely reduce the environmental impact of a society?
A) providing developing countries with the technologies needed for manufacturing automobiles B) construction of industrial plants by wealthy nations to draw on cheaper labor C) increased use of electricity and natural gas by most members of a society D) greater use of birth control by most members of a society E) the discovery of large reserves of fossil fuels within a nation's borders
The Earth continually falls toward the Sun, but doesn't get closer because
A. its tangential velocity causes it to fall around as well as toward the Sun. B. the distance of fall is unattainable. C. gravitation is extremely weak at the Sun-Earth distance. D. all of the above
Because of unconformities, the geologic record at any given location is incomplete. In other words, no one locality on Earth can provide a complete record of our planet's history.
a. true b. false
The lithosphere includes
A. part of the mantle and the crust. B. continental and oceanic crust. C. the crust and the upper part of the mantle. D. all of the above