Ocean #1

Which best explains how nutrients, salt, sediment and pollutants get

into estuaries and oceans?

• from rivers and streams flowing into estuaries and oceans

• from asteroids and comets impacting Earth at estuaries and oceans

In which location would fishermen most likely catch a greater number of

fish?

• at the shoreline

• in an upwelling

Which technology is most efficient in mapping large areas of the ocean

floor?

• sonar

• satellite imaging

Why are many fishing boats found near ocean upwellings?

• Many marine species gather there to eat the nutrients brought to the

  surface.

• Upwellings are found in more shallow waters, so boats do not need

  deep anchorage.

Which best describes the shallow water ocean zone?

• Sunlight penetration increases algae growth and provides food for a

  variety of organisms.

• Hydrothermal vents provide heat and dissolved minerals needed by

  some organisms to survive.

Which is able to give the most detailed information about the topography

of a large area on the ocean floor?

• sonar

• satellite imagery

Which hazard must submersible vehicles overcome while exploring and

studying the deep ocean zone?

• increased salinity

• high water pressure

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

• decay of living organisms

• plants and algae that live near the surface

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

• deep zone

• surface zone

Which are the most abundant dissolved gases in ocean water?

• nitrogen and carbon dioxide

• oxygen and carbon dioxide