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WorksheetsAquatic Ecosystems
Total questions: 32
Worksheet time: 16mins
Name
Class
Date
1.
Which is NOT a type of aquatic ecosystem?
a)
ocean
b)
estuary
c)
monastery
d)
wetland
2.
Temperature, sunlight and oxygen are examples of ____ factors.
a)
abiotic
b)
biotic
3.
This means the amount of salt dissolved in water.
a)
salinity
b)
salutation
c)
saturation
d)
saltiness
4.
Freshwater has ____ amount of salt in it.
a)
more than 1 ppm
b)
less than 1 ppm
c)
10 ppm
d)
more than 30 ppm
5.
Rivers are larger, deeper and flow ___ than streams.
a)
slower
b)
faster
6.
When soil washes into a river from a stream or from land, what is added to the water?
a)
dirt
b)
oxygen
c)
rocks
d)
nutrients
7.
Which natural disaster is made worse when people destroy estuaries?
a)
flooding and storm damage
b)
tornados
c)
earthquake
d)
drought
8.
What are areas where freshwater meets saltwater called?
a)
wetlands
b)
estuaries
c)
coastal byways
d)
intertidal zones
9.
Which is NOT a freshwater ecosystem?
a)
stream
b)
lake
c)
ocean
d)
river
10.
What are coral reefs?
a)
rock
b)
deposits of bones of dead fish
c)
plants
d)
outside skeletons of tiny, soft-bodied animals
11.
What special adaptations do intertidal species have?
a)
to resist UV rays
b)
to survive exposure to air
c)
to survive heavy waves
d)
Exposure to air AND survive heay waves
12.
Which of the following is NOT a freshwater ecosystem?
a)
lake
b)
pond
c)
estuary
d)
stream
13.
How do fish use oxygen from the water?
a)
breath it with special lungs
b)
gills separate it and send it to the blood stream
c)
take it in through small pores
d)
absorb it through their scales
14.
On the coral reef ecosystem, which factor is abiotic?
a)
algae
b)
rocks
c)
sea horses
d)
sponges
15.
Which statement is true about ponds but NOT lakes?
a)
plants surround the shore
b)
surface water contains organisms that use sunlight for photosynthesis
c)
sunlight reaches the bottom of the body of water
d)
people fill them in with sediment to create land for houses and buildings
16.
Which has higher oxygen levels?
a)
faster moving water
b)
slower moving water
c)
speed of water has no effect on oxygen content
d)
all water has the same amount of oxygen
17.
Wetlands contain which of the following?
a)
only freshwater
b)
only saltwater
c)
either freshwater or saltwater
d)
very little nutrients
18.
How do people use water from freshwater ecosystems?
a)
drinking
b)
bathing
c)
crop irrigation
d)
all of the above
19.
If you see a wetland with trees growing in it,
a)
it is most likely freshwater
b)
it is most likely salt water
c)
there isno way to predict if it is freshwater or salt water
d)
it is salwater AND freshwater
20.
What is salinity?
a)
the amount of salt dissolved in water
b)
the amount of oxygen dissolved in water
c)
the amount of pollution in water
d)
the speed of the flow of water in a stream
21.
Runoff fertilizer and livestock waste from farms can add to the ____ of a pond?
a)
nutrients
b)
oxygen
c)
pollution
d)
biotic factors
22.
Aquatic ecosystem that has a thin layer of water covering soil that is wet most of the time is called ____.
a)
wetland
b)
estuary
c)
lake
d)
puddle
23.
Wetlands and estuaries purify water and filter out _____.
a)
dead organisms
b)
waste products
c)
salt
d)
pollution
24.
These types of plants are at dams on rivers and use the flowing water to create electricity.
a)
weeds
b)
cattails
c)
hydroelectric
d)
grasses
25.
The algae and microscopic organisms on the surface of lakes and ponds get their food
a)
by photosynthesis
b)
by eating
c)
through their gills
d)
through their stomata
26.
What is among the world's most fertile ecosystems?
a)
lake
b)
pond
c)
estuary
d)
wetlands
27.
This includes several types of ecosystems, including continental shelves and intertidal zones.
a)
coral reefs
b)
tropical oceans
c)
open oceans
d)
coastal oceans
28.
This is the ocean shore between the lowest low tide and the highest high tide.
a)
estuary
b)
intermoon zone
c)
shore erosion
d)
intertidal zone
29.
More than ____ of American bird species use wetlands for nesting and feeding.
a)
1/2
b)
1/3
c)
1/4
d)
10%
30.
This area starts several kilometers from the coast.
a)
intertidal zone
b)
coral reef
c)
continental shelf
d)
open ocean
31.
_____ are larger and deeper than _____.
a)
lakes, ponds
b)
streams, rivers
c)
lakes, oceans
d)
puddles, lakes
32.
Temperature, sunlight and dissolved oxygen are all important factors in what?
a)
land ecosytems
b)
aquatic ecosystems
c)
deserts
d)
grasslands
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