Estuaries

An estuary is best defined as a place where

• fresh and salt water meet.

• a river meets a lake.

• a group of animals are gathered.

• the water from the land flows into a river.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-5

A salt wedge forms in an estuary because

• fresh water is more dense than seawater and sinks down.

• fresh water is less dense than seawater and sinks down.

• fresh water is more dense than seawater and floats on top.

• fresh water is less dense than seawater and floats on top.

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

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

True or False:

Sharks can live in Estuaries

• True

• False

True or False:

Estuaries are one of the most productive Ecosystems/Biomes in the world.

• False

• True

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-5

Which letter marks the estuary in the diagram shown?

• B

• C

• A

Tags

NGSS.MS-LS2-3

NGSS.MS-ESS2-4

Which of the following are types of estuaries?

• Bays.

• Lagoons.

• Mangrove swamps.

• All of the above.

Why are estuaries important to our environment?

• Estuaries filter pollutants and prevent erosion.

• Estuaries provide nurseries for marine life.

• Estuaries act as home for many types of wildlife.

• All of the above.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

Bays, lagoons, salt marshes, mudflats, and mangrove swamps are all types of

• freshwater wetlands.

• lakes.

• bogs.

• estuaries.

Salinity in an estuary can fluctuate drastically. However, when moving UPSTREAM salinity will always ____________.

• increase

• decrease

• stay the same