Estuaries Exam

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

• Brackish Acid

• Fresh Water

• Salt Water

• Brackish Water

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

• increase

• decrease

• stay the same

Where would you find greater salinity in an estuary?

• on the surface of the water

• near the bottom

• somewhere in the middle

Are salinity levels in estuaries higher or lower than the open ocean?

• Higher

• Lower

• The same

What are some plants you might find in an estuary?

• 
• 
• 
• 

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which of the following are alternative names for estuaries?

• Bays

• Lagoons

• Sounds

• all of the above

What type of tide has two high tides and two low tides a day for a total of 4 shifts in salinity?

• diurnal tide

• semidiurnal tide

• mixed semidiurnal tide

• unstable diurnal tide

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

Anadromous fish spend their lives in ________________ and then breed in ___________________.

• ocean / fresh water

• fresh water / ocean

• ocean / estuary

• estuary / fresh water

Euryhaline species are able to handle salinity levels

• that vary widely

• that vary narrowly

• that remain at an intermediate

• that are very high