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Chapter3 Ocean
Chapter 3. Ocean Test Flashcards
| Question | Answer |
|---|---|
| Name 5 oceans by decreasing size | Pacific, Atlantic, Indian, Southern, Arctic |
| All the continents once formed a giant landmass called ______ | Pangea *Continental Drift* |
| What happens to the Atlantic Ocean each year? | Gets Wider |
| What happens to the Pacific Ocean each year? | Becomes smaller |
| What is the ocean water's most abundant salt? | Sodium Chloride (NaCl) |
| What measures the amount of dissolved salt in a liquid? | Salinity |
| A body of water for its high salinity is ____ | The dead sea |
| Where does the salt in the ocean come from? | Rivers and streams that carry the dissolved minerals to the ocean. |
| How does the pressure change as you go deeper in the ocean? | It increases |
| Why do hot, dry coastal waters have a higher salinity than cool, humid climates? | Heat increases the evaporation rate. Evaporation removes but leaves salts & other solids. |
| How does ocean temperature change with depth? | Surface zone- warmest & temp stays about the same; Thermocline- temp drops quickly; Deep- coldest & only changes a small amount |
| What causes water to evaporate from the ocean? | Sun |
| How does the ocean help regulate temperatures in the atmosphere? | Absorbs & hold energy from sunlight |
| What are 3 methods for studying the ocean floor? | SONAR, Satellites, & Underwater vessels |
| SONAR works by ________ | Sound waves bouncing off the ocean floor |
| The gently sloping area attached to a continent is the ________ | Continental shelf |
| The steeply sloping are between the continental shelf and the ocean floor is the _________ | Continental slope |
| An underwater mountain formed by volcanoes is a _________ | Seamount |
| Deep, flat areas of the ocean floor are called _________ | Abyssal Plain |
| Plates at mid-ocean ridges are _____ | Moving apart *DIVERGENT BOUNDARY* |
| Plates at ocean trenches are _______ | Colliding & 1 is pushed below the other *CONVERGENT* |
| New ocean floor is created at ________ | Mid-ocean ridges |
| Old ocean floor is destroyed at ________ | Trenches |
| What will a seamount become if it breaks the water's surface? | A volcanic island |
| What is the deepest known spot on the ocean floor? | Mariana's trench *CHALLENGER DEEP* |
| What is plankton? | Organism that float or drift freely near the oceans surface. *Krill, diatoms, eggs, larvae* |
| What is Nekton? | Organism that swim actively in open ocean *Whales, sharks, dolphins, fish, ect.* |
| What are Benthos? | Organisms that live on or in the ocean floor *Crabs, coral, eel grass, starfish, anemones* |
| What is a producer? | It makes its own food (photosynthesis) |
| What is a consumer? | Something that eats other organisms |
| What direction should the arrows in a food web or chain point? | Point up because of what it's eaten by |
| What's an estuary? | Something that forms where rivers run into oceans |
| What is water in an estuary? | Brackish, meaning it is partially salty and partially fresh. |
| What do coral reefs form from? | The skeletons of dead coral |
| What are 2 examples of problems or concerns about living ocean resources? | Overfishing & Drift nets |
| What is seaweed used for? | To thicken food |
| What is desalination? | Process of removing salt from sea water |
| What is tidal energy? | Energy generated from the movement of tides and can only be used where coastlines are shallow & have a channel |
| What is a nonpoint-source pollution? | Many sources from different sites |
| What is a point source pollution? | Comes from 1 site |
Created by:
F__Kennedy
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