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Worksheetsinteraction among living things on estuaries
Total questions: 20
Worksheet time: 13mins
This is a place wherein freshwater and saltwater meet.
estuary
intertidal zone
forest
ocean
In which aquatic ecosystem would you find ocean fish being raised as food for humans?
a. a wetland
b. a coral reef
c. an estuary
d. an intertidal zone
Based on how estuaries form, which of the following best describes the salinity of estuary water? Its salinity is __________.
a. equal to the salinity of river water
b. less than the salinty of river water
c. less than the salinity of ocean water
d. greater than the salinity of ocean water
if the plankton are removed from the estuary, what may happen to the estuarine food web?
a. Plankton are producers so their removal may not have an effect.
b. The other animals in the estuary will have to find other food sources.
c. Removal of any organism like the plankton will greatly affect the ecosystem.
d. Filter feeders like oysters and clams don't depend on the presence of plankton.
Water is brought to an estuary from a variety of sources. Which of the following would contribute to an increase in the salinity of the estuary?
a. rivers
b. streams
c. urban runoffs
d. tides
One of the fastest swimming crabs in the world is the blue crab. Which of the following is an adaptation of the crab for the said ability?
a. jointed legs
b. large claws
c. body shape
d. paddle-like rear feet
Estuaries come in many forms and sizes. What other names have they been called?
a. bays and lagoons
b. harbors and intels
c. sounds and sloughs
d. all of the above
True or False:
Estuaries are one of the most productive Ecosystems/Biomes in the world.
False
True
How have estuaries been affected by humans?
dredged to make harbors
filled in for development
polluted by industrial parks
all answers are correct
Glaciers that have cut through granite rock form these type of estuaries:
bar built
fjords
salt marshes
mangroves
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.
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
What is the most important thing that all living organisms need to survive?
water
dissolved oxygen
sunlight
Which organisms use sunlight to make their own food?
Producers
Consumers
Decomposers
Which ecological relationship if two species benefits at one another?
Commensalism
Mutualism
Predation
Which ecological relationship if barnacles stay on the whales?
Commensalism
Mutualism
Predation
Which is the nonliving thing that is necessary for fish, crabs, oyster, and aquatic animals to survive?
Water
Dissolved Oxygen
Sunlight
(a) is the study of the relationship between living organisms and their environment
