EOG Saltwater 1

The ocean currents affect a. Climate b. Coriolis c. pH d. Wind

a. Climate

This will produce a warm current increasing the water temperature affecting the weather a. El Nino b. La Nina c. La Nino d. El Nina

a. El Nino

Which best explains the poor productivity of the open ocean? a. Photosynthesis is reduced because sunlight does not penetrate very deeply. b. Large fish consume most of the phytoplankton, which reduces photosynthetic reactions. c. Photosynthesis cannot occur in the phytoplankton because the temperature is too high. d. Most of the phytoplankton is found at depths where there is no sunlight penetration.

a. Photosynthesis is reduced because sunlight does not penetrate very deeply.

Which best illustrates how aquatic and terrestrial food webs are interconnected? a. Red tide in the sea poisons land plants and animals. b. Phytoplankton use sunlight to produce food. c. Sharks eat smaller fish in the ocean. d. Algal blooms feed the fish populations.

a. Red tide in the sea poisons land plants and animals.

Which is able to give the most detailed information about the topography of a large area on the ocean floor? a. SONAR b. Buoys c. Scuba Divers d. Submarines

a. SONAR

Which factors limit the productivity of a marine ecosystem? a. availability of light and nutrients b. availability of nutrients and fresh water c. availability of light and chemosynthetic organisms d. availability of photosynthetic organisms and fresh water

a. availability of light and nutrients

Which is most likely to be the energy source for organisms living in hydrothermal vents? a. methane b. oxygen c. carbon dioxide d. sunlight

a. methane

These organisms live in the deep dark ocean and produce light through chemical reactions a. Photosynthesizing Plants b. Bioluminescence Fish c. Benthos Whales d. Hydrothermal Vents

b. Bioluminescence Fish

Deep ocean technology has discovered organisms in hydrothermal vents that do not rely on sunlight to survive. What do these organisms use as their energy source? a. Thermal Heat b. Chemosynthesis c. Electrical Charge d. Hydropower

b. Chemosynthesis

Which hazard must submersible vehicles overcome while exploring and studying the deep ocean zone? a. Under Water Mountains b. High Water Pressure c. High Waves d. High Salinity

b. High Water Pressure

Why are many fishing boats found near ocean upwellings? a. The water is less turbulent there. b. Many marine species gather there to eat the nutrients brought to the surface. c. There is less vegetation there. d. Upwellings are found in more shallow waters, so boats do not need deep anchorage.

b. Many marine species gather there to eat the nutrients brought to the surface.

Which is the main source of dissolved oxygen in the ocean? a. Decay of living organisms b. Plants and algae that live near the surface c. Underwater earthquakes d. Animals that live near the surface

b. Plants and algae that live near the surface

Why is productivity greatest near the oceans surface? a. More predators live in the top layers of the ocean b. Sunlight penetrates the top layers of the ocean, so photosynthesis occurs there. c. Nutrients, minerals, and gases are more available to marine life in the bottom layers of the ocean. d. Salinity at all layers of the open ocean is fairly consistent.

b. Sunlight penetrates the top layers of the ocean, so photosynthesis occurs there.

A cargo ship in the open ocean spills thousands of cans of soda off the ship. Which marine ecosystem will primarily be disturbed by this spill? a. Estuary b. Surface Zone c. Hydrothermal Vents d. Coral Reef

b. Surface Zone

Which organism is at the base of a marine food web? a. zooplankton b. phytoplankton c. whale d. crab

b. phytoplankton

This zone is dark and has extreme conditions a. Neritic b. Open Ocean c. Deep d. Intertidal

c. Deep

What causes upwelling in the oceans? a. Coral Reef Construction b. Animal Migration Patterns c. Wind and Current Current d. Photosynthesis Reactions

c. Wind and Current Current

Bluefin tuna has become the most popular fish for sushi in Japan. Which is most likely the impact this has had on the species? a. There has been no impact on the species. b. All bluefin are now raised on farms. c. Bluefin numbers are increasing. d. Bluefin numbers are decreasing.

d. Bluefin numbers are decreasing.

What is the most abundant solid in the ocean a. Calcium Carbonate b. Carbon Dioxide c. Magnesium Sulfate d. Sodium Chloride

d. Sodium Chloride

Which best describes the shallow water ocean zone? a. Hydrothermal vents provide heat and dissolved minerals needed by some organisms to survive b. The long water column protects small organisms from being eaten by large predators. c. Cooler water temperatures cause a decrease in dissolved oxygen needed by organisms. d. Sunlight penetration increases algae growth and provides food for a variety of organisms.

d. Sunlight penetration increases algae growth and provides food for a variety of organisms.

How is the amount of oxygen in ocean water affected by temperature? a. The amount of oxygen in ocean water decreases as temperature decreases. b. The amount of oxygen in ocean water is kept constant as temperature decreases c. The amount of oxygen in ocean water increases as temperature increases d. The amount of oxygen in ocean water increases as temperature decreases.

d. The amount of oxygen in ocean water increases as temperature decreases.

The diagram below shows the surface winds and water in a coastal area. Which best describes this process? a. Downwelling b. Density Currents c. Spring Tides d. Upwelling

d. Upwelling

Which contributes most in supporting life on the deep ocean floor? a. cold water temperatures b. extreme water pressure c. lack of pressure d. hydrothermal vents

d. hydrothermal vents

In which location would fishermen most likely catch a greater number of fish? a. in the intertidal zone b. at the shoreline c. on the deep-ocean floor d. in an upwelling

d. in an upwelling

Scientists use a variety of methods to monitor the ocean. Buoys are used to collect data at the surface. Which is most effective in monitoring large areas of the ocean floor? a. weather balloon b. remote-operated vehicles c. submarines d. satellites

d. satellites