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WorksheetsEstuaries review
Total questions: 13
Worksheet time: 8mins
Salinity in an estuary can fluctuate drastically. However, when moving UPSTREAM salinity will always ____________.
increase
decrease
stay the same
Here in the U.S. estuaries are nurseries to over ____ % of all fish and shellfish harvested.
99
10
75
100
Are salinity levels in estuaries higher or lower than the open ocean?
Higher
Lower
The same
An estuary is best defined as a place where--
fresh and salt water meet
a river meets the Chesapeake Bay
a group of animals are gathered
the water from the land flows into a river
A mix of salt water and fresh water is called..
mixture
brackish
abiotic
biotic
Where would you find greater salinity in an estuary?
On the surface of the water.
Near the bottom.
Somewhere in the middle.
It would be the same throughout the estuary.
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.
Euryhaline species are able to handle salinity levels
that vary widely
that vary narrowly
that remain at an intermediate
that are very high
In which estuary zone is the land covered during high tide and exposed during low tide?
subtidal zone
intertidal zone
supratidal zone
Check off the types of Estuaries that have been created by glacials?
Drowned River Mouth/Coastal Plain
Fjord
Bar-built
Tectonic
Where would you find a Mangrove Forest?
In the Arctic
In Temperate areas
In Tropical areas
What is an adaptation that Mangrove trees and shrubs have to deal with oxygen depleted soil?
Roots that block salt from entering
Leaves that excrete excess salt
Roots that shoot out of the ground like snorkels
Leaves that have special pores to take oxygen in
What is the biggest threat to Mangrove Forests ecosystem?
Shrimp farming
sea level rise
Invasive species
waste dumpiong
