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12.14: Aquatic Biomes

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

aphotic zone

Area in aquatic biomes deeper than 200 meters so little light penetrates the water.

aquatic biome

Biome that is based in the water, such as ponds, lakes, streams, or oceans.

chemosynthesis

Process of using the energy in chemical compounds to make food; characteristic of producers in ecosystems without sunlight.

coral

Marine animals typically living in compact colonies of many identical individual polyps; includes the reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton.

coral reef

Underwater structures made from calcium carbonate secreted by corals; colonies of tiny living animals found in marine waters that contain few nutrients.

estuary

Partially enclosed body of water where fresh water from rivers and streams meets and mixes with salt water from an ocean.

freshwater biome

Aquatic biome with a salt content of less than 1%; ponds and lakes, streams and rivers, and wetlands.

headwaters

Source of a river or stream; the place where a river begins its journey.

marine biome

Aquatic biome in the salt water of the ocean; also includes coral reefs and estuaries.

mouth

Part of the river where it empties into another body of water, such as another river, lake, bay, or ocean.

photic zone

Area in an aquatic biome that extends to a maximum depth of 200 meters so that at least some light penetrates the water.

photosynthesis

Process by which specific organisms (including all plants) use the sun's energy to make their own food from carbon dioxide and water; process that converts the energy of the sun, or solar energy, into carbohydrates, a type of chemical energy.

wetland

Land area that is saturated with water, either permanently or seasonally, with the characteristics of a distinct ecosystem.

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Difficulty Level:
At Grade
Grades:
7 , 8
Date Created:
Nov 29, 2012
Last Modified:
Sep 11, 2016
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