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Homework answers / question archive / Question 1 1 / 1 pts Algin (alginate) is a commercial product that is harvested from Fish Crabs Seaweed (kelp) Sediments Whales Question 2 1 / 1 pts Which commercial fishing technique is damaging to slow-growing organisms and complex ecosystems? Purse sine Drift netting Bottom trawling Long line fishing Question 3 1 / 1 pts Animals that are unintentionally killed while collecting desirable organisms are know as Sidecatch Non-extractive organisms Bycatch MSYs Question 4 1 / 1 pts Waves, tides, and currents are a potential source of marine energy
Question 1
1 / 1 pts
Algin (alginate) is a commercial product that is harvested from
Fish
Crabs
Seaweed (kelp)
Sediments
Whales
1 / 1 pts
Which commercial fishing technique is damaging to slow-growing organisms and complex ecosystems?
Purse sine
Drift netting
Bottom trawling
Long line fishing
1 / 1 pts
Animals that are unintentionally killed while collecting desirable organisms are know as
Sidecatch
Non-extractive organisms
Bycatch
MSYs
1 / 1 pts
Waves, tides, and currents are a potential source of marine energy.
True
False
1 / 1 pts
Why is fisheries management more difficult than managing other resources?
It is difficult to get an accurate count of fish species in the ocean
Many of the fish species that are being harvested are new to science
There is little or no support for this type of management
It is run by the commercial fishing industry, which tends to falsify data
1 / 1 pts
Why is horizontal drilling preferable in some cases to vertical drilling?
It can pick up more oil
It is cheaper
It can be drilled from land and aimed at the continental shelf
It is faster
0 / 1 pts
Where is methane hydate found?
In the sediments of the deep ocean
In the shallow water sediments of the continental shelf
In the sediments of some continental slopes
In the shallow ice layers of the arctic ocean
1 / 1 pts
What is a potential drawback of mining methane hydrate and using it as an energy source?
It is not very abundant
Methane gas is not very flammable
The use if this fuel will put oil companies out of business
Removing methane stored in marine sediments may contribute to climate change
1 / 1 pts
Which of the following is a nonrenewable resource?
Fish
Wind energy
Seaweed
Mineral deposits
1 / 1 pts
What conditions in the past were necessary for the eventual production of oil?
High productivity that fostered high populations of marine animals that eventually would die and settle to the sea floor.
The accumulation of organic sediments in very deep water, which can then be carried below the crust at convergent plate boundaries.
Growth of massive fern forests that in shallow wetlands.
The accumulation of planktonic organisms and bacteria in quiet basins where the oxygen supply was low.
1 / 1 pts
What is a result of overfishing?
Increased supply of valuable species
The lowering of seafood prices
Increased wages for the commercial fishing industry
Not enough breeding stock is left to replenish a species
1 / 1 pts
What is necessary to convert hydrocarbons into oil?
Passive margins and thick continental rise
Strong currents, cool water, and plate movement
Pressure, heat, and time
Deep water, darkness, and little current
1 / 1 pts
Sand dredged from the ocean is used in the production of cement, glass, and other building materials.
True
False
1 / 1 pts
About 1/3 of the worlds ______ is produced from seawater by evaporation.
Algae for biofuel
Table salt
Silica sand
Freshwater
1 / 1 pts
Extraction of wind energy over or near the ocean is especially effective because
It is cheaper to install and maintain turbines over the ocean
They can be combined with oil platforms
Average wind speed is lower over the ocean compared to land
Wind is steady (less gusty) over the ocean
