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Worksheets4.5 Aquatic Ecosystems
Total questions: 34
Worksheet time: 20mins
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.
Which natural disaster is made worse when people destroy estuaries?
a)
flooding and storm damage
b)
tornados
c)
earthquake
d)
drought
5.
What are areas where freshwater meets saltwater called?
a)
wetlands
b)
estuaries
c)
coastal byways
d)
intertidal zones
6.
Which is NOT a freshwater ecosystem?
a)
stream
b)
lake
c)
ocean
d)
river
7.
What are coral reefs?
a)
rock
b)
deposits of bones of dead fish
c)
plants
d)
outside skeletons of tiny, soft-bodied animals
8.
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 heavy waves
9.
On the coral reef ecosystem, which factor is abiotic?
a)
algae
b)
rocks
c)
sea horses
d)
sponges
10.
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
11.
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
12.
Wetlands contain which of the following?
a)
only freshwater
b)
only saltwater
c)
either freshwater or saltwater
d)
very little nutrients
13.
How do people use water from freshwater ecosystems?
a)
drinking
b)
bathing
c)
crop irrigation
d)
all of the above
14.
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
15.
Runoff fertilizer and livestock waste from farms can add to the ____ of a pond?
a)
nutrients
b)
oxygen
c)
pollution
d)
biotic factors
16.
Wetlands and estuaries purify water and filter out _____.
a)
dead organisms
b)
waste products
c)
salt
d)
pollution
17.
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
18.
What is among the world's most fertile ecosystems?
a)
lake
b)
pond
c)
estuary
d)
wetlands
19.
_____ are larger and deeper than _____.
a)
lakes, ponds
b)
streams, rivers
c)
lakes, oceans
d)
puddles, lakes
20.
Temperature, sunlight and dissolved oxygen are all important factors in what?
a)
land ecosytems
b)
aquatic ecosystems
c)
deserts
d)
grasslands
21.
Bacteria kill organisms in eutrophic lakes by reducing _______ dissolved in the lake
a)
Oxygen
b)
Food
c)
Bacteria
d)
Sunlight
22.
Animals that live in estuaries must be adapted to varying levels of
a)
Height
b)
Colors
c)
Temperature
d)
Salinity
23.
Wetlands are important to fisheries in the united states because many of the fish caught each year use the wetlands for _______ and ________
a)
Dying and decaying
b)
Feeding and spawning
c)
Living and working
d)
Escaping and evading
24.
Dense growths of mangrove trees in swampy areas are called
a)
Forest
b)
Coral reef
c)
Fish farm
d)
Mangrove swamps
25.
In estuaries, rivers deposit their loads of mineral rich mud and form
a)
Deltas
b)
Salt marshes
c)
Lakes
d)
Divergences
26.
Bottom dwelling organisms.
a)
Plankton
b)
Fish
c)
Mammals
d)
Benthos
27.
What are the 3 types of wetlands?
a)
swamp, ocean, river
b)
pond, river, marsh
c)
marsh, marsh, marsh
d)
swamp, marsh, bog
28.
Why does photosynthesis not occur in the deep ocean?
a)
Lack of nutrients
b)
Low oxygen levels
c)
Excess sunlight
d)
Sunlight does not penetrate
29.
Which zone supports the least amount of life?
a)
photic
b)
aphotic
c)
neritic
d)
ocean
30.
Which would have whales and chemosynthetic bacteria?
a)
coastal ocean
b)
intertidal ocean
c)
open ocean
31.
Which would have barnacles, seaweed, and starfish?
a)
coastal ocean
b)
intertidal ocean
c)
open ocean
32.
Which is NOT a freshwater wetland?
a)
estuary
b)
marsh
c)
bog
d)
swamp
33.
The aphotic zone is
a)
the ocean's dark lower layer where photosynthesis cannot occur
b)
the sunlit upper layer of the ocean where photosynthesis occurs
c)
on the bottom of lakes, streams, and oceans.
d)
where benthos are found
34.
The photic zone
a)
extends to the bottom of the open ocean
b)
extends to a depth of about 200 meters
c)
is deep, cold, and permanently dark
d)
is where chemosynthetic bacteria are the producers
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