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WorksheetsEcology-grade 10-4
Total questions: 25
Worksheet time: 41mins
Name
Class
Date
1.
For a pyramid of numbers, the width of the bar shows the__________ of organisms present in each trophic level at a particular time.
a)
number
b)
biomass
c)
energy
d)
volume
2.
The number of organisms _________ with each successive (higher) trophic level.
a)
increases
b)
decreases
3.
Organisms of a lower trophic level have a comparatively __________ number compared to organisms of the higher trophic level in order to support them.
a)
larger
b)
smaller
4.
Which of the following shows the correct pyramid of numbers for the food chain?
a)
A
b)
B
5.
Which of the following shows the correct pyramid of numbers for the food chain?
a)
A
b)
B
6.
Which of the following shows the correct pyramid of biomass for the food chain?
a)
A
b)
B
7.
Which of the following shows the correct pyramid of biomass for the food chain?
a)
A
b)
B
8.
Which of the following shows the correct pyramid of biomass for the food chain?
a)
A
b)
B
9.
In this energy pyramid, which organisms have the most energy available?
a)
Producers
b)
Carnivores
c)
Herbivores
d)
Top Predator
10.
In an ecological pyramid, which type of organism always has the least amount of energy available?
a)
Producers
b)
Herbivores
c)
Carnivores
d)
Top Predator
11.
How much of the energy in each level of a ecological pyramid gets lost as heat or used by the organism so that it cannot be passed on to the next trophic level?
a)
80%
b)
90%
c)
10%
d)
20%
12.
The diagram represents a pyramid of energy in an ecosystem. Which level would most likely contain organisms that do photosynthesis?
a)
A
b)
B
c)
C
d)
D
13.
If there are 100 Kcal of energy available in the producers, how much energy would be available in the herbivores?
a)
10 Kcal
b)
1 Kcal
c)
100 Kcal
d)
1000 Kcal
14.
According to the Amoeba Sisters' video, which has more biodiversity? A food chain or a food web?
a)
Food Chain
b)
Food Web
15.
A food pyramid represent the relative amount of energy in trophic levels. Which of the following correctly shows a food pyramid?
a)
A
b)
B
c)
C
d)
D
16.
The diagram represents different levels of a marine food pyramid. Between which two levels is the least amount of energy transferred
a)
R and Q
b)
S and R
c)
T and S
d)
U and T
17.
If these organisms were arranged in an ecological biomass pyramid, which organism would have the least amount of biomass?
a)
coyote
b)
insect
c)
lizard
d)
shrub
18.
Which statement best describes what will happen if the population of herbivores in the community decreases?
a)
the population of foxes will increase
b)
the population of hawks will increase
c)
the population of rabbits will increase
d)
the population of meadow plants will increase
19.
The diagram represents different levels of a marine food pyramid. Between which two levels is the greatest amount of energy transferred
a)
R and Q
b)
S and R
c)
T and S
d)
U and T
20.
What does a pyramid of numbers compare?
a)
the number of individual organisms at each trophic level
b)
the number of individuals in each population
c)
the number of predators and prey in an ecosystem
d)
the number of different populations at each trophic level
21.
Which organism do the owl and the weasel compete for in the food web?
a)
Hawk
b)
Spider
c)
Grasshopper
d)
Shrew
22.
Which of the following is a herbivore?
a)
cricket
b)
frog
c)
hawk
d)
shrew
23.
What might happen if you remove a primary consumer from the ecosystem?
a)
There would be more food for secondary consumers.
b)
The number of primary consumers would increase.
c)
The number of plants would increase.
d)
The number of secondary consumers would increase.
24.
Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?
a)
There would be a decrease in the small bird population.
b)
There would be a decrease in the grass/flowers population.
c)
There would be a decrease in the mice population.
d)
There would be an increase in the grass/flowers population.
25.
Use the pyramid of biomass below to decide which of the following tables is correct.
a)
b)
c)
d)
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