Freshwater quiz 2025

What is an estuary?

• A little body of water.
• water in a gaseous form.
• Places where fresh water and streams flow into the ocean.
• the presence of an unwated msterial in a given place.

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NGSS.MS-ESS2-4

NGSS.MS-LS2-3

What kind of water is in an estuary?

• Brackish
• spring
• salt
• fresh

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NGSS.MS-ESS2-4

When salt and fresh water mix, what is the new water substance called?

• Brackish Acid
• Fresh Water
• Salt Water
• Brackish Water

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NGSS.MS-PS1-2

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

• littoral 
• benthic 
• nekton

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NGSS.MS-LS2-2

How much salt is in something is called_____________

• Salinity
• Evaporation
• Seamount

Mangrove swamps occur in warm climates near the __________________.

• forest
• oceans
• lakes

Why doesn’t photosynthesis occur in Oceans/lakes./seas below 200m ?

• There is no sunlight.
• There are not enough nutrients. 
• The salinity level of the water is too high.
• The water temperature is too cold.

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NGSS.MS-LS1-6

A salt marsh is a coastal ecosystem in:

• Epipelagic zone
• Bathypelagic zone
• Intertidal zone
• Mesopelagic zone

What human activity affects the environment in such a way that algae blooms increase?

• agricultural runoff

• fertilizer run off from lawns

• septic system failure

• all of the above

Tags

NGSS.MS-LS2-4

NGSS.MS-ESS3-3

Which is a point source of pollution?

• Farm runoff

• A sewage treatment plant

• Storm runoff

• A suburban community

• A harbor