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WorksheetsCh. 5 How Ecosystems Work
Total questions: 31
Worksheet time: 31mins
Name
Class
Date
1.
a)
photosynthesis
b)
cellular respiration
c)
decomposition
d)
synthesis
2.
Because plants and algae make their own food they are known as
a)
decomposers
b)
heterotrophs
c)
autotrophs
d)
consumers
3.
Chemosynthesis occurs
a)
at the top of a mountain
b)
at the bottom of the ocean
c)
in a volcano
d)
in space only
4.
Which of the following organisms is considered to be a herbivore?
a)
bear
b)
wolf
c)
elk
d)
vulture
5.
The following are products of cellular respiration
a)
carbon dioxide, glucose
b)
oxygen, glucose, energy
c)
carbon dioxide, water, energy
d)
oxygen, energy
6.
Which of the following is an example of a decomposer?
a)
flower
b)
bee
c)
human
d)
bacteria
7.
Each time energy is transferred from one trophic level to the next, how much energy is lost as heat?
a)
10%
b)
30%
c)
70%
d)
90%
8.
The rabbit
a)
is a primary consumer
b)
is a secondary consumer
c)
is a tertiary consumer
d)
is a quaternary consumer
9.
Which of the following received their energy directly from the sun?
a)
producers
b)
consumers
c)
decomposers
d)
scavengers
10.
Which term is used to refer to the many feeding relationships that are possible in an ecosystem?
a)
energy pyramid
b)
food web
c)
food chain
d)
energy transfer
11.
Carbon is NOT a component of which of the following?
a)
carbohydrates
b)
proteins
c)
fats
d)
nucleic acids
12.
Which of the following is one of the largest carbon sinks?
a)
carbon dioxide in the atmosphere
b)
calcium carbonate in coral reefs
c)
carbon stored in limestone at bottom of ocean
d)
carbon stored in humans
13.
Photosynthesis and cellular respiration are both associated with which of the following cycles?
a)
sulfur cycle
b)
carbon cycle
c)
nitrogen cycle
d)
phosphorus cycle
14.
Which of the following is NOT a fossil fuel?
a)
coal
b)
oil
c)
ethanol
d)
natural gas
15.
When fossil fuels are burn, what gas is released into the atmosphere?
a)
atmospheric nitrogen
b)
oxygen
c)
carbon dioxide
d)
sulfur dioxide
16.
The burning of fossil fuels leads to what environmental problem?
a)
ozone depletion
b)
saltwater intrusion
c)
habitat destruction
d)
global warming
17.
The nitrogen and phosphorus cycles are both involved with which of the following?
a)
fertilizers
b)
pesticides
c)
insecticides
d)
rocks
18.
When fertilizers runoff into a body of water, what might they cause?
a)
algal bloom, oxygen depletion
b)
algal bloom, increase in oxygen
c)
algal bloom, increase in fish
d)
decrease in algae, fish deaths
19.
Acid precipitation is associated with what cycle?
a)
carbon
b)
zinc
c)
nitrogen
d)
phosphorus
20.
Bacteria play an important role in what cycle?
a)
nitrogen
b)
carbon
c)
phosphorus
d)
water
21.
The process of returning nitrogen back to the atmosphere is called
a)
nitrogen fixation
b)
ammonification
c)
assimilation
d)
denitrification
22.
What percent of the atmosphere is made of nitrogen?
a)
30%
b)
10%
c)
78%
d)
82%
23.
Which of the following is NOT considered to be a legume?
a)
corn
b)
soybeans
c)
peanuts
d)
clover
24.
Which of the following cycles is associated with the weathering of rocks?
a)
carbon cycle
b)
phosphorus cycle
c)
nitrogen cycle
d)
sulfur cycle
25.
Which of the following is responsible for making nitrogen in the atmosphere usable by living organisms?
a)
conversion of nitrogen into carbohydrates
b)
absorption of nitrogen into water systems
c)
nitrogen-fixing bacteria
d)
decomposing bacteria
26.
Which of the following does NOT cycle into the atmosphere?
a)
water
b)
phosphorus
c)
nitrogen
d)
carbon
27.
Which of the following is a type of secondary succession?
a)
islands formed by volcanic eruption
b)
abandoned parking lot
c)
forest after a fire
d)
rocks exposed after glacier melt
28.
Species that colonize a newly available area during ecological succession are referred to as
a)
pioneer species
b)
climax species
c)
dominant species
d)
recessive species
29.
What are the pioneer species that can break down rock during primary succession?
a)
lichens
b)
grass
c)
shrubs
d)
trees
30.
What kind of natural disaster helps some forest communities by allowing trees to release their seeds, by clearing away deadwood, and by encouraging new growth?
a)
drought
b)
tornado
c)
flood
d)
fire
31.
Which of the following would most likely be the climax species of abandoned farmland 150 years later?
a)
tall grasses
b)
shrubs
c)
young pine trees
d)
mature oak trees
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