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10 Cards in this Set
- Front
- Back
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What is the transition zone?
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extending from the bottom of the surface zone to a depth of about 1 kilometer.
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what are the conditions of the transition zone?
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The water is darker and colder
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what are the conditions of the deep zone?
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Harsh-- cold and dark
Food supply is limited |
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What is the production of light by living things called?
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Bioluminescence
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How does bioluminescence occur?
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Different ways: 1) sometimes light is produced by bacteria that live on the body of fishes. 2) Other times
the chemical reactions take place on the body of fishes |
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What are some of the adaptions organisms need to live in the deep zone?
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Food is scarce so they must be good hunters. Bioluminescence provides light but also attracts prey.
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What is a hydrothermal vent?
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A place where hot water rises out of cracks in the ocean floor
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Where are hydrothermal vents located?
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Along ocean ridges where plates are moving apart. Magma beneath the ocean floor heats the water.
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Why are hydrothermal vents important to organisms in teh deep ocean?
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Because bacteria can feed on the chemical nutrients that are carried through the vent from the earth's interior. These bacteria form the base of a food web at a hydrothermal vent.
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True or false
The organisms around a hydrothermal vent are typical of deep zone organisms. |
False.
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