| Hint | First Letter | Answer | % Correct |
|---|---|---|---|
| The shallow (typically less than 200 m) and flat sub-marine extension of a continent. | C | {Continental} shelf | 88%
|
| A large, floating piece of glacial ice. | I | Iceberg | 88%
|
| A long, narrow depression on the seafloor. | T | Trench | 88%
|
| A small shrimplike crustacean of the open seas eaten by a number of larger animals, including baleen whales. | K | Krill | 86%
|
| A system for the detection of objects under water and for measuring the water's depth by emitting sound pulses and detecting or measuring their return after being reflected. | S | Sonar | 84%
|
| A ring-shaped carbonate (or coral) reef or series of islands. | A | Atoll | 81%
|
| An underwater ecosystem characterized by colonies of coral polyps held together by calcium carbonate. | C | Coral reef | 81%
|
| The amount of dissolved salts present in water. | S | Salinity | 79%
|
| A volcanic rock that makes up much of the oceanic crust. | B | Basalt | 78%
|
| The movement of water from one location to another. | C | Current | 76%
|
| The small and microscopic organisms drifting or floating in the sea or fresh water, consisting chiefly of diatoms, protozoans, small crustaceans, and the eggs and larval stages of larger animals. | P | Plankton | 76%
|
| The base level for measuring elevation and depth on Earth. | S | Sea level | 74%
|
| The Earth’s crust underlying the oceans (as opposed to continental crust). | O | Oceanic crust | 69%
|
| A group of predominantly aquatic, photosynthetic, and nucleus-bearing organisms that lack the roots, stems, leaves, and specialized multicellular reproductive structures of true plants. | A | Algae | 66%
|
| The major surface current flowing northwards along the Atlantic coast of the U.S. and Canada. | G | Gulf Stream | 62%
|
| A flat region of the ocean floor, usually at the base of a continental rise, where slope is less than 1:1000. | A | {Abyssal} plain | 60%
|
| Unconsolidated particles of mineral or rock that settle to the seafloor. | S | Sediment | 55%
|
| A long, thin island parallel to the shore, created through the deposition of sand. | B | Barrier island | 34%
|
| The measurement of depth of water in oceans, seas, or lakes. | B | Bathymetry | 34%
|
| The natural separation of an ocean's water into horizontal layers by density. | S | Stratification | 34%
|
| A submerged mountain rising from the seafloor. | S | Seamount | 31%
|
| The sudden release and breaking away of a mass of ice from a glacier, iceberg, ice front, ice shelf, or crevasse. | C | Calving | 28%
|
| Any of several continuous submarine mountain chains rising from the ocean floor. | O | Oceanic ridge | 21%
|
| A relatively large piece of floating sea ice, i.e., ice that has formed from frozen ocean water. | I | Ice floe | 19%
|
| A boundary between a continent and the ocean that is also a tectonic plate boundary. | A | Active continental margin | 3%
|