Earth's Oceans

How are estuaries connected to oceanic organisms?

• A. Estuaries provide sunlight for oceanic organisms.
• B. Estuaries provide primary food for oceanic organisms.
• C. Estuaries provide excess dissolved oxygen for oceanic organisms.
• D. . Estuaries provide a nursery grounds for oceanic organisms.

Which will most likely result if there is increased upwelling in a coastal area?

• A. more aquatic life in the area
• B. more turbidity 
• C. fewer nitrates
• D. higher water temperatures

Which best explains why the water cycle mostly occurs over the oceans?

• Salt water evaporates more quickly than freshwater
• The temperatures over the oceans are warmer than over land.
• Most of Earth’s water is located in the oceans.
• The temperatures over the oceans are cooler than over land     

Which explains why there are fewer marine organisms in the deeper zones of the ocean?

• amount of light decreases
• pollution increases
• salinity increases
• ph increases

Which best describes organisms that live in the intertidal zone?

•  they can all swim
• they are all fish
• . they can survive in both freshwater and saltwater
• They can survive in  both air and water

Which process allows cold ocean water, rich in nutrients, to rise to the surface?

• Photosynthesis
• desalination 
• undertow   
• . upwelling

Why is plastic trash dangerous to marine animals?

• Animals are not affected by plastic trash
• Plastic trash breaks down too quickly.
• Plastic trash is oily and sludgy.
• Animals can mistake it for food and choke on it.

What percentage of the Earth's surface is covered in water?

• 75%
• 61%
• 81%
• 71%

The temperature of the ocean gets _________ the deeper you go. 

• Colder
• Warmer
• Saltier
• Cleaner

salinity

• bottom layer of ocean water

• the amount of dissolved salts in a liquid

• warm, top layer of ocean water

• 2nd layer of ocean water