WorksheetsAquatic Ecosystems Mastery Check
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
Productivity in an aquatic ecosystem is most dependent on:
a)
Water salinity
b)
Nutrient availability and sunlight
c)
Temperature changes
d)
The number of predators present
2.
Which of the following is true about aquatic productivity?
a)
Neritic waters, including coral reefs and kelp forests, have high productivity
b)
The benthic zone has the highest rate of productivity
c)
The open ocean, including both the photic and aphotic zone, is the most productive ecosystem
d)
Estuaries have low productivity
3.
Which aquatic zone receives the most sunlight?
a)
Aphotic zone
b)
Benthic zone
c)
Photic zone
d)
Profundal zone
4.
A _______ is an example of a standing body of freshwater.
a)
River
b)
Stream
c)
Lake
d)
Estuary
5.
Which of the following is not a freshwater ecosystem?
a)
Lakes
b)
Rivers
c)
Coral reefs
d)
Wetlands
6.
The movement of water in rivers is primarily driven by:
a)
Wind currents
b)
Ocean tides
c)
Elevation changes and gravity
d)
Salinity differences
7.
The floor of a body of water is known as the ___________.
a)
Benthic zone
b)
Aphotic zone
c)
Photic zone
d)
Limnetic zone
8.
Which zone of a pond or lake is most likely to have rooted plants?
a)
Limnetic zone
b)
Profundal zone
c)
Littoral zone
d)
Neritic zone
9.
A smaller river that flows into a larger one is called a:
a)
Meander
b)
Tributary
c)
Watershed
d)
Floodplain
10.
The term "watershed" refers to:
a)
The area drained by a river and its tributaries
b)
The curve in a river's path
c)
A river that enters the ocean
d)
A land area that prevents flooding
11.
What is a floodplain?
a)
The source of a river
b)
The area of land near a river that can flood
c)
Where the river and ocean meet
d)
Rock or sediment filled with groundwater
12.
An estuary is:
a)
An area of land that is underwater for at least part of the year
b)
A body of water where a river meets the ocean
c)
A lake that forms in a desert, providing an area where of high biodiversity
d)
A swamp that dries out, leading to nutrient rich soil for agriculture or forest growth
13.
What makes estuaries highly productive?
a)
They are in areas with high amounts of sunlight
b)
They have high temperatures year-round
c)
They receive nutrient-rich sediments from rivers
d)
They are the cleanest and purest freshwater available
14.
Which is an example of an estuary?
a)
Bog
b)
Coral reef
c)
Hydrothermal vent
d)
Floodplain
e)
Mangrove swamp
15.
The neritic zone is important because:
a)
It contains high biodiversity due to sunlight and nutrients
b)
It is where hydrothermal vents form
c)
It is where icebergs are found
d)
It has the lowest productivity in the ocean
16.
Which marine ecosystem is found in the neritic zone?
a)
Mangrove swamps
b)
Salt marshes
c)
Coral reefs
d)
Abyssal plains
e)
Deep-sea trenches
17.
The intertidal zone is the area of the ocean where:
a)
The deepest parts of the ocean are found
b)
Waves crash against the shore and conditions change frequently
c)
Productivity is very low, and plants and animals rely on chemical energy
d)
Coral reefs and kelp forests thrive
18.
What is an important adaptation for an organism living in the intertidal zone to have?
a)
A tough shell to prevent drying out
b)
Bioluminescence to attract prey
c)
The ability to perform chemosynthesis instead of photosynthesis
d)
Strong fins for swimming through deep water
19.
The aphotic zone of the ocean lacks:
a)
Fish and mammals
b)
Light for photosynthesis
c)
Deep-sea currents
d)
Life of any kind
20.
Hydrothermal vents support life using:
a)
Photosynthesis
b)
Chemosynthesis
c)
Oxygen from land
d)
Nutrients from coral reefs
100 %
