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WorksheetsEcosystems Chapter 21
Total questions: 11
Worksheet time: 6mins
Name
Class
Date
1.
Ecologists study feeding patterns to learn how energy flows within a(n) __.
a)
species
b)
ecosystem
c)
population
d)
niche
2.
Organisms that use the sun's energy to turn water and carbon dioxide into food molecules are called
a)
decomposers
b)
pioneer species
c)
consumers
d)
producers
3.
A diagram that shows the amount of energy that moves from one feeding level to another in an ecosystem is called a(n)
a)
food chain
b)
food web
c)
succession
d)
energy pyramid
4.
Wind, water, and living things are three means of __________________.
a)
dispersal
b)
succession
c)
decomposition
d)
continental drift
5.
A(n) _____________________ is a carnivore that feeds on the bodies of dead organisms.
a)
decomposer
b)
producer
c)
scavenger
d)
herbivore
6.
Plants, algae, and some microorganisms make food molecules in the process of
a)
photosynthesis
b)
decomposition
c)
succession
d)
nitrogen fixation
7.
The very slow motion of huge blocks of Earth's crust is called _________.
a)
decomposition
b)
continental drift
c)
succession
d)
dispersal
8.
Organisms that obtain energy by feeding on other organisms are ________.
a)
producers
b)
consumers
c)
decomposers
d)
herbivores
9.
Physical barriers, competition, and climate conditions can limit the _________ of a species.
a)
succession
b)
decomposition
c)
condensation
d)
dispersal
10.
Which of the following is true about an energy pyramid?
a)
The greatest amount of energy is available at the producer level.
b)
At each higher level of the pyramid, there is more energy available.
c)
About half the energy from one level is transferred to the next level.
d)
Most food webs have five or more feeding levels.
11.
Which of the following is true about food webs?
a)
Second level consumers must be omnivores.
b)
Producers are at the top of the food web.
c)
All first level consumers are carnivores.
d)
An organism may play more than one role in a food web.
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