Terms and Definitions
Levels of the Ocean
A Little Geography
All about Oceans
Surviving in the Deep
100

The two most prominent ions in the ocean are sodium and chlorine. When combined the create sodium chloride which is also known as this common household item.

What is table salt. 

100

This level of the ocean is illuminated almost completely at midday.  

Photic zone 

100

0 degrees latitude 

The equator 

100

This ocean separates North and South America from Europe and Africa. 

The Atlantic Ocean 

100

In the deep zone there is no photosynthesis occurring because there is no what?

Sunlight. 

200

Our world has been called "the blue planet" because 71% of its surface is covered in a massive interconnected body of water known as what?

The world ocean. 

200

This is the topmost layer of the ocean.

Surface zone 

200

23.5 degrees north latitude 

Tropic of Cancer 

200

This ocean separates Africa from Australia.

Indian Ocean 

200

Instead of relying on photosynthesis various bacterial species  rely on a process called what?

Chemosynthesis 

300

These regions of the earth are known to have seasons.

Temperate regions 

300

This area of the ocean is located just above the halocline.

Thermocline 

300

23.5 Degrees south latitude 

Tropic of Capricorn 

300

This ocean separates North and South America from Asia and Australia. 

The Pacific Ocean 
300

What do life forms that live near hydrothermal vents eat?

Chemosynthetic bacteria 

400

The lowest stratum of the ocean is known as what?

Deep zone 

400

This area of the ocean receives no light. 

The deep zone 

400

The equator is an imaginary line that separates the earth into two what two equal halves? 

The Northern and Southern Hemispheres 

400

This Ocean Surrounds Antarctica. 

Southern Ocean 

400

Life forms on the ocean floor also ingest and convert _____________________________ into organic matter.

Hydrogen Sulfide 

500

Superheated water is discharged back into the ocean under high pressure in areas known as...

Hydrothermal vents 

500

The area just underneath the halocline.

The pycnocline 

500
A geographical location specifying a north-south location on the earth. 

Latitude 

500

This ocean covers the northern pole of the earth. 

The Arctic Ocean

500

The deep zone contains the coldest ocean water which reaches temperatures as low as...  

2 degrees C or 32-36 degrees F