Environmental Chapter 7.1 Freshwater Ecosystems

The types of organisms in an aquatic ecosystem are mainly determined by the water's ?

• oxygen

• carbon

• salinity

• carbon dioxide

The amount of dissolved salts the water contains is?

• salinity

• eutrohpication

• saltiness

• hydrosphere

Aquatic ecosystems are divided into what two ecosystems?

• marine

• wetland

• biome

• freshwater

Which is NOT an example of a freshwater ecosystem?

• lakes

• ponds

• wetland

• swamps

Which image is not an example of a marine ecosystem?

• 
• 
• 
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Factors such as temperature, sunlight, oxygen, and nutrients determine which organisms live in which areas of water.

• True

• False

The 3 types of aquatic organisms are

• plankton

• aquakton

• nekton

• benthos

Which aquatic organism floats near the surface of the water?

• benthos

• nekton

• plankton

Which aquatic organism is a free-swimming organism like a fish, turtle or whale?

• benthos

• nekton

• plankton

Which aquatic organisms are bottom-dwelling organisms, such as mussels, worms, and barnacles?

• benthos

• nekton

• plankton