Aquatic Ecosystems

Which is NOT a freshwater ecosystem?

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

Tags

NGSS.5-ESS2-2

An ecosystem where water covers the soil or water is near the surface of the soil is called

• a desert
• an ocean
• an estuary
• a wetland

Tags

NGSS.5-ESS2-1

Wetlands and estuaries purify water and filter out _____.

• dead organisms
• waste products
• salt
• pollution

Tags

NGSS.MS-LS2-3

Roughly how much of the Earth's water is marine (salt)?

• 97%

• 70%

• 50%

• 3%

Fertilizer washing into lakes and causing algae to over produce is what?

• eutrophication

• trawling

• drainage

• recreation

What are wetlands?

• areas of land that are flooded at least part of the year

• the ocean

• lakes

• estuaries

Salinity refers to

• how many plants are in the water

• how many organisms live in the water

• how much salt in is water

All are freshwater ecosystems except

• marshes

• lakes

• eustary

• rivers

The bottom region of oceans and bodies of fresh water is 

• Benthos
• Benthic Zone
• Limnetic Zone
• Nekton

Aquatic life is abundant, diverse, and full of sunlight at which zone?

• littoral zone

• benthic zone

• limnetic zone