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WorksheetsAquatic Ecosystems and Biomes
Total questions: 20
Worksheet time: 12mins
Name
Class
Date
1.
This biome has the most diverse species of plants and animals.
a)
desert
b)
tropical rainforest
c)
savanna
d)
tundra
2.
Which two biomes have the least precipitation?
a)
tropical rain forest and temperate grasslan
b)
savanna and tropical dry forest
c)
tundra and desert
d)
boreal forest and temperate woodland
3.
Which is NOT a freshwater ecosystem?
a)
a river
b)
a lake
c)
an estuary
d)
a stream
4.
A wetland that contains a mixture of fresh water and salt water is called
a)
an estuary
b)
a stream
c)
a river
d)
a pond
5.
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
6.
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
7.
The intertidal zone of oceans
a)
surrounds continents
b)
is on the coastline
c)
has tides that rise and fall each day
d)
is the open ocean
8.
Which factor(s) affect aquatic ecosystems?
a)
depth
b)
flow
c)
nutrients
d)
all affect aquatic ecosystems
9.
Circulating water in lakes and ponds is important for distributing
a)
heat
b)
oxygen
c)
nutrients
d)
all of these
10.
phytoplankton are
a)
tiny autotrophic organisms in water
b)
large plants
c)
tiny heterotrophic organisms in water
d)
large animals
11.
zooplankton are
a)
tiny autotrophic organisms in water
b)
large plants
c)
tiny heterotrophic organisms in water
d)
large animals
12.
An ecosystem where water covers the soil or water is near the surface of the soil is called
a)
a desert
b)
an ocean
c)
an estuary
d)
a wetland
13.
Which is NOT a freshwater wetland?
a)
estuary
b)
marsh
c)
bog
d)
swamp
14.
Estuaries form where
a)
a lake evaporates
b)
a river meets the sea
c)
a river becomes dammed
d)
a wetland becomes filled in
15.
Estuary water should have
a)
less salt than the ocean
b)
more salt than the ocean
c)
no salt
16.
Which would have kelp forests and coral reefs?
a)
intertidal zone
b)
coastal ocean
c)
open ocean
17.
Which would have barnacles, seaweed, and starfish?
a)
coastal ocean
b)
intertidal ocean
c)
open ocean
18.
Which would have whales and chemosynthetic bacteria?
a)
coastal ocean
b)
intertidal ocean
c)
open ocean
19.
Which zone supports the least amount of life?
a)
photic
b)
aphotic
c)
neritic
d)
ocean
20.
Which biome has dense evergreen (pine) forests?
a)
taiga (boreal forest)
b)
tundra
c)
desert
d)
savanna
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