Freshwater Ecosystems

Where would you find cattails and reeds?

• Limnetic zone
• Littoral zone
• Profundal zone
• Benthic zone

Tags

NGSS.MS-LS2-1

What are organisms living on, near, or in the sediment of lakes called?

• Nekton

• Plankton

• Decomposers

• Benthos

The plankton that is animal-like is called

• zooplankton

• phytoplankton

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

This lake zone suffers from a lack of light and has limited photosynthesis:

• Littoral
• Benthic
• Profundal
• Limnetic

Tags

NGSS.MS-LS1-6

______ are all organisms that swim freely, independent of currents.

• Benthos

• Zooplankton

• Nekton

• Phytoplankton

Eutrophic lakes are characterized by...

• low nutrients, low oxygen
• low nutrients, high oxygen
• high nutrients, low oxygen
• high nutrients, high oxygen

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Organisms that live on the bottom of aquatic ecosystems are known as

• plankton

• benthos

• nekton

Which is NOT a freshwater ecosystem?

• a river
• a lake 
• an estuary
• a stream

Tags

NGSS.5-ESS2-2

An increase in the amount of nutrients in a lake is known as

• nutrification

• algal blooms

• eutrophication

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Headwaters are

• the end of a river.

• also know as wetlands.

• the start of a river.

• small ponds.