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WorksheetsEstuaries and Intro to Oceans
Total questions: 12
Worksheet time: 7mins
What is an estuary?
The land area that drains water into a lake river or pond
The area where river meets the ocean, where fresh water and salt water mix.
The large body of salt water that covers most of earths surface.
The underground system that provides drinking water to an area.
Why are estuaries important to our environment?
Estuaries filter pollutants
Estuaries provide nurseries for marine life
Estuaries act as home for many wildlife
All of the above
What is an Ocean?
small body of water
large body of water
about _____% of the Earth's water can be found in our oceans.
25%
67%
72%
97%
There are _____ oceans in the world
4
6
5
9
The _________ is located in the North Pole.
Antarctic Ocean
Southern Ocean
Arctic Ocean
Indian Ocean
How have estuaries been affected by humans?
dredged to make harbors
filled in for development
polluted by industrial parks
all answers are correct
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
The most abundant salt in seawater is
calcium chloride
magnesium chloride
manganese chloride
sodium chloride
