Freshwater Ecosystems

What do you call water with very low salinity?

• Freshwater
• Saltwater
• Marine
• Estuarine

An area where land is periodically underwater.

• Wetland

• River

• Lake

• Stream

Tags

NGSS.MS-ESS2-4

NGSS.MS-LS2-3

Microscopic organisms that float near the surface of the water are called

• plankton 
• littoral 
• benthic

The plankton that are microscopic and plant like are called 

• zooplankton 
• phytoplankton 
• minnows

Tags

NGSS.MS-LS2-3

The plankton that is animal-like is called

• bacteria 
• phytoplankton 
• zooplankton 

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

• Benthic 
• Zooplankton 
• Nekton 

The zone near the shoreline in a lake is known as the _________________zone.

• benthic 
• photosynthesis  
• littoral 

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

• plankton 
• oligotrophic 
• eutrophication 

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which of these determines what types of organisms live in water?

• water temperature
• oxygen levels of water
• sunlight & nutrients
• water temperature, oxygen levels, sunlight & nutrients

Which is NOT a freshwater ecosystem?

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

Tags

NGSS.5-ESS2-2