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WorksheetsEcosystems
Total questions: 13
Worksheet time: 8mins
Name
Class
Date
1.
All life on Earth exists in a region known as
a)
an ecosystem
b)
a biome
c)
the biosphere
d)
ecology
2.
Groups of different species that live together in a defined area make up a(n)
a)
population
b)
community
c)
ecosystem
d)
biosphere
3.
Autotrophs are organisms that
a)
rely on other organisms for their energy & food supply.
b)
consume plant & animal remains and other dead matter.
c)
use energy they take in from the environment to convert inorganic molecules to organic molecules.
d)
obtain energy by eating only plants.
4.
The series of steps in which a large fish eats a small fish that has eaten algae is a
a)
food web
b)
food chain
c)
biomass pyramid
d)
pyramid of numbers
5.
Which of the following would be classified as a decomposer?
a)
a fox
b)
a cherry tree
c)
bacterium
d)
a blue jay
6.
The total mass of living tissue at each trophic level can be shown in a(n)
a)
energy pyramid
b)
pyramid of numbers
c)
biomass pyramid
d)
biogeochemical cycle
7.
A group of individuals belonging to a single species that live together in a defined area is termed a(n)
a)
population
b)
community
c)
ecosystem
d)
family
8.
In addition to herbivores, another type of consumer is a(n)
a)
carnivore
b)
omnivore
c)
detritivore
d)
all of these
9.
According to the biomass pyramid shown, which organism or group of organisms would have the most mass?
a)
Sparrowhawk
b)
Bluetit
c)
Catepillar
d)
Oak tree
10.
According to the biomass pyramid shown, which organism would eat the catepillar
a)
producer
b)
primary consumer
c)
secondary consumer
d)
tertiary consumer
11.
Why are food chains, such as the one shown, limited to 4-5 organisms?
a)
There are not more organisms in the ecosystem
b)
Organisms must share resources
c)
Energy transfers are inefficient
d)
They are only limited when organisms are living on land.
12.
According to the food web shown, what would occur if there were a drastic decrease in the squirrel population?
a)
There would be fewer vultures
b)
There would be more nuts and seeds.
c)
There would be fewer vultures & there would be more nuts and seeds.
d)
There would be more grass.
13.
Which of the following is NOT a way that ecologists study the natural world?
a)
Observing
b)
Modeling
c)
Experimenting
d)
All of these are correct
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