The Ocean Environment

If a marine scientist wanted to study the depth of the ocean at a particular point, what is the best method for them?

• Side Scan Sonar

• Multibeam Sonar

• Plumb line

• Satellite 

MOST sealife lives in the:

• Photic zone

• Twilight zone

• Midnight zone

• Deep zone

Tags

NGSS.MS-LS2-3

The aphotic zone is

• the ocean's dark lower layer where photosynthesis cannot occur

• the sunlit upper layer of the ocean where photosynthesis occurs

• on the bottom of lakes, streams, and oceans.

• where benthos are found

Which zone supports the least amount of life?

• photic

• aphotic

• neritic

• ocean

Organisms that live on the bottom of aquatic ecosystems are known as 

• littoral 

• benthic 

• nekton

Which ocean is the largest and the deepest (of all major oceans)?

• Atlantic Ocean

• Arctic Ocean

• Pacific Ocean

• Indian Ocean

The Ocean covers what percentage of the Earth's surface?

• 60%

• 72%

• 81%

• 53%

Which ocean is the smallest and shallowest (of all major oceans)?

• Pacific Ocean

• Indian Ocean

• Arctic Ocean

• Atlantic Ocean

The ocean floor —

• is always a flat bed of sand

• has mountains, plains, and ridges like land surfaces

• is covered by the same amount of water everywhere

• covers less area than the land

Which of these are the deepest parts of the ocean?

• Continental shelves

• Continental slopes

• Ocean trenches

• Abyssal plains