Freshwater Ecosystems

Choose the letter of the term or phrase that best matches the named term(s).

marine ecosystem

• temperature

• coral reef

• pond

• benthos

• nekton

Choose the letter of the term or phrase that best matches the named term(s).

bottom-dwelling organisms

• temperature

• coral reef

• pond

• benthos

• nekton

Choose the letter of the term or phrase that best matches the named term(s).

factor that determines where aquatic organisms live

• temperature

• coral reef

• pond

• benthos

• nekton

Choose the letter of the term or phrase that best matches the named term(s).

free-swimming organisms

• temperature

• coral reef

• pond

• benthos

• nekton

Choose the letter of the term or phrase that best matches the named term(s).

freshwater ecosystem

• temperature

• coral reef

• pond

• benthos

• nekton

Swamps are commonly found on

• rocky hillsides.

• flat, poorly drained land.

• mountain peaks.

• bottoms of ponds or lakes.

The type of plankton that produces most of the food in an aquatic ecosystem is called

• nekton.

• phytoplankton.

• benthos.

• zooplankton.

In which aquatic zone would you be likely to find cattails and reeds?

• littoral

• benthic

• eutrophic

• limnetic

What are the two main types of freshwater wetlands?

• lakes and ponds

• rivers and streams

• littoral zones and benthic zones

• marshes and swamps

Which ecosystem has the highest level of salinity?

• salt marsh

• brackish marsh

• river

• pond