Oceanography NHS

Salinity means

• how many fish are in the water
• how much salt is in the water

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 land

Where is the ocean deepest?

• ocean trench
• volcanic island
• abyssal plain 
• mid-ocean ridge

Plankton are microscopic single-celled oragnisms. 

• True
• False

The main difference between ocean water and lake water is that ocean water contains

• oxygen
• salt
• algae
• plants

What do the arrows represent in the picture?

• waves
• currents
• tides

What causes the tides to change?

• rotation of the Earth
• magic
• gravitational pull from the moon
• ocean currents

The large flat region of the ocean floor is called the 

• ocean trench
• continental shelf
• abyssal plain
• seamount 

The Gulf Stream is 

• a stream behind the school 
• a current in the Atlantic Ocean that flows on the eastern coast of North America 
• a boat 
• part of the ocean floor 

Deep Ocean currents are a result of

• Global Wind Patterns
• Earth's Rotation
• Density
• All of the above