Marine Resources C15: Question Preview (ID: 3526)

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Nearly half the world;s manganese comes from
a) sea water b) seabed sediments c) methane hydrates d) natural gas
Sea water evaporites are used in the production of
a) medicine and fertilizer b) water softners and construction materials c) all of the answers are correct d)
Phosphorite deposits are the remains of marine organisms in upwellings
a) true b) false c) d)
Most phosphorite deposits are found on land because
a) off shore phosphorites are expensive to harvest b) the need for phosphorites is decreasing c) phosphorites are not important d) none of the answers are correct
Hydrothermal vents and marine mud are potential sources of
a) cobalt b) copper and zinc c) sulfur d) all of the answers are correct
________________ is second only to gas and oil in terms of annual economic value
a) sand and gravel b) methane hydrates c) magnesium d) evaporites
Renewable energy is found in
a) tides, waves and currents b) hurricanes and typhoons c) none of the answers are correct d) all of the answers are correct
The most feasible renewable energy resource from the ocean is
a) the energy in tides b) the energy in waves c) the energy in currents d) none of the answers are correct
The concern about fresh water is
a) melting ice caps will dilute the ocean b) demand for the fresh water will soon exceed the supply of fresh water c) none of the answers are correct d)
To use sea water as fresh water, we must
a) boil the sea water and collect the vapor b) force the seawater through a reverse osmosis filter c) none of the answers are correct d)
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