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| The farming of saltwater and freshwater organisms. |
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| The upward force exerted by a fluid on a submerged object. |
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| The total amount of dissolved salts in a water sample. |
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| An underwater vehicle built of strong materials to rresist pressure. |
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| The effect of the Earth's rotation on the direction of winds and currents. |
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| The movement of cold water upward from the deep ocean that is caused by wind. |
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| A large stream of moving water that flows through the oceans. |
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| A coastal inlet or bay where fresh water from rivers mixes with salty ocean water. |
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| The production of light by living things. |
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| A system that uses sound waves to calculate the distance to an object, and that gets its name from sound navigation and ranging. |
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| The mid ocean ridge is located along the boundaries between plates that are moving apart. Along the ridge magma squeezes up throught the crack between the diverging plates. As the magma hardens this adds new strips of rock over millions of years this cause seafloor spreading. |
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| Tiny algae and animals that float in water and are carried by waves and currents. |
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| Free swimming animals that can move throughout the water column. |
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| organisms that live on the bottom of the ocean or other body of water. |
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