Review (8E.1.1, 8E1.2 &8E.1.3) 5

Why do large numbers of ocean life-forms live near areas of upwelling?

• Upwelling brings nutrients to the surface.

• Upwelling brings warm water to the surface.

• Upwelling helps push small fish up toward the surface.

• Upwelling keeps large predator fish away from the surface.

Which hazard must submersible vehicles overcome while exploring and studying the deep ocean zone?

• high waves

• increased salinity

• high water pressure

• underwater mountain ranges

Which is the main source of dissolved oxygen in the ocean?

• underwater earthquakes

• decay of living organisms

• animals that live near the surface

• plants and algae that live near the surface

In which ocean zone is ocean temperature most affected by the weather?

• deep zone

• polar zone

• surface zone

• transition zone

Which are the most abundant dissolved gases in ocean water?

• nitrogen and carbon dioxide

• oxygen and carbon dioxide

• oxygen and methane

• nitrogen and sulfide

Which causes cold ocean water to rise during an upwelling event?

• motion of organisms

• deep water currents

• mass of nutrients

• surface winds

Which best describes the source of oxygen in ocean water?

• Oxygen is produced by marine plants in the process of making food.

• Oxygen is produced through the exhalations of marine animals.

• Oxygen is produced through precipitation falling on the ocean.

• Oxygen is produced by nodules on the ocean floor.

What is the movement of cold, nutrient-rich waters from the bottom of the ocean, promoting algae growth?

• upwelling

• deposition

• precipitation

• eutrophication

In which part of the ocean do the greatest number of organisms live?

• in the deep zone to escape predators

• near the shore to burrow in the sand

• close to the surface to be near the largest food source

• in the open ocean to regulate their bodies in cooler temperatures

Which organism is at the base of a marine food web?

• crab

• phytoplankton

• whale

• zooplankton