Fifth Grade Science Chapter 9

Ocean

100

Aquatic biome having no more than 1% dissolved salt

Freshwater biome

200

Aquatic biome having at least 3 1/2 % dissolved salt

Saltwater biome

300

Study of ocean ecosystems

Marine ecology

400

Layers of the ocean divided by depth of water - sunlight zone, twilight zone, midnight zone, abyssal zone, and hadal zone

Vertical zones of the ocean

500

Biomes or regions of the ocean distinguished by distance from land - intertidal zone, neritic zone, and oceanic zone

Horizontal zones of the ocean

Intertidal Zone

100

Part of the intertidal zone that floods during high tide and is usually uncovered

High tide region

200

Part of the intertidal zone that experiences the ocean only occasionally, either by sea spray or by flooding

Splash region

300

Part of the intertidal zone that is usually submerged underwater, except during low tide

Low tide region

400

Tropical plant with above ground prop roots; often form forests and grow in swamps in the intertidal zone

Mangrove

500

Part of the intertidal zone that experiences equal times of being covered and uncovered by water

Middle region

Neritic Zone

100

Horizontal ocean zone; extends from the coast to the end of the continental shelf; shallowest and most sunlit region of the ocean

Neritic Zone

200

Giant algae

Kelp

300

Shallow body of salt water formed between a coral reef and land

Lagoon

400

Only flowering plants of the ocean

Seagrass

500

Organism that does not move from one place to another

Sessile

Other Zones

100

Horizontal ocean zone; extends from the edge of the continental shelf to the open ocean; includes all vertical layers of the ocean

Oceanic zone

200

Vertical zone of the ocean with the most light; where photosynthesis occurs

Sunlight zone

300

Vertical zone of the ocean with only dim light; unable to support photosynthesis

Twilight zone

400

Vertical zone of the ocean that is the first layer with no sunlight

Midnight zone

500

Vertical zone of the ocean located beneath the midnight zone that extends to the ocean floor

Abyssal zone

Terms

100

Detritus falling through water toward the sea floor

Marine snow

200

Vertical zone of the ocean located primarily in deep-sea trenches

Trenches

300

Horizontal ocean zone coastal area between the highest and lowest tides

Intertidal zone

400

Organisms that live on the ocean floor, such as bivalves, crabs, and sea stars

Benthos

500

Process in which bacteria use chemical energy to make food

Chemosynthesis