Oceans

A connection between terrestrial and aquatic food webs is best exemplified by which pair of animals?

• dolphins and fish

• lions and gazelles

• pelicans and fish

• spiders and flies

Which statement best describes an estuary?

• An estuary is the extension of a continent located underwater.

• An estuary is land that is exposed at low tide and is underwater at high tide.

• An estuary is a partly enclosed body of water where a river meets the ocean.

• An estuary is a deep body of water that contains large animals.

The diagram shows a boat using sonar to gather information in the ocean. What is most likely being measured with this technology?

• ocean depth

• ocean temperature

• pH level

• turbidity level
  

The population of photosynthetic organisms is higher in the neritic zone and surface waters than in the deep ocean. Which statement best explains the reason for this?

• There is more space for plants to grow in these areas of the ocean.

• There is more dissolved oxygen for plants in these areas of the ocean.

• The availability of sunlight and nutrients supports photosynthetic organisms.

• The high salinity and cool temperature supports photosynthetic organisms.
  

Which statement best describes how nutrients move in the ocean as a result of upwelling?

• Nutrients move from estuaries into the intertidal zone.

• Nutrients move from warm, shallow areas to deep, colder areas.

• Nutrients move from the neritic zone to the intertidal zone.

• Nutrients move from deep, colder areas to warm, shallow areas.
  

Which tool would most likely  be used by scientists to explore a hydrothermal vent at the Mid-Atlantic Ridge?

• buoy

• remote operated vehicle

• satellite imagery

• sonar
  

Which process occurs in the ocean and contributes large amounts of oxygen to the atmosphere?

• digestion by fish

• decomposition by bacteria

• respiration by zooplankton

• photosynthesis by phytoplankton
  

What % of the world is water?

• 20%

• 50%

• 70%

• 97%

Which of the following statement about salt in the oceans is true?

• It is sodium chloride

• it is less salty that salt we eat

• it has been in the ocean for only 50 years

• it is saltier than the salt we eat

What is salinity?

• the amount of sodium in liquid

• the amount of water that has evaporated

• the amount of dissolved salts in a liquid

• the amount of solids in a liquid