WorksheetsPrinciples of Ecology
Total questions: 26
Worksheet time: 17mins
Name
Class
Date
1.
What is the purpose of decomposers in the flow of energy?
a)
They eat dead organisms.
b)
They remove nutrients from plants.
c)
They recycle nutrients.
d)
They give energy to the plants and animals.
2.
The term biodiversity means:
a)
a wide variety of plants and animals in an ecosystem
b)
only a few types of plants and animals in an ecosystem
c)
an ecosystem composed mostly of plants
d)
an ecosystem composed mostly of animals
3.
A species that maintain biodiversity by keeping prey populations controlled is called a(n)...
a)
Quaternary Consumers
b)
Top Predators
c)
Invasive Species
d)
Keystone Species
4.
A sea otter and a sea star are examples of...
a)
primary consumers
b)
keystone species
c)
native species
d)
autotrophs
5.
Which organism do the owl and the weasel compete for in the food web?
a)
Hawk
b)
Spider
c)
Grasshopper
d)
Shrew
6.
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.
7.
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.
8.
Which of the following best describes the small bird in the food web above?
a)
primary and secondary consumer
b)
secondary and tertiary consumer
c)
primary consumer only
d)
secondary consumer only
9.
In this energy pyramid, which organisms have the most energy available?
a)
Producers
b)
Carnivores
c)
Herbivores
d)
Top Predator
10.
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%
11.
In this ecological pyramid which type of consumer gets only 10% of the energy stored in plants?
a)
Primary Consumers
b)
Tertiary Consumer
c)
Secondary Consumers
d)
Primary Producers
12.
If the producers 100 kcal of energy, how much energy would be transferred to the snakes?
a)
1 kcal
b)
10 kcal
c)
100 kcal
d)
0.10 kcal
13.
If the producers have 10,000 kcal how much do the secondary consumers have?
a)
1,000 kcal
b)
100 kcal
c)
10 kcal
d)
1 kcal
14.
The arrows in a food chain or web represents what?
a)
They point to the organism that is being eaten.
b)
It shows how sunlight flows within an ecosystem.
c)
They show the flow of energy in an ecosystem.
d)
They represent how water is transferred within a habitat.
15.
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
16.
A localized group of organisms that belong to the same species is called a(n)...
a)
community
b)
population
c)
ecosystem
d)
family
17.
Which of the following terms includes all of the others?
a)
primary consumers
b)
herbivores
c)
carnivores
d)
heterotrophs
18.
A mouse eats grass. A snake eats the mouse and an eagle eats the snake. What is the eagle?
a)
producer
b)
primary consumer
c)
secondary consumer
d)
tertiary consumer
19.
Which organisms in the food chain have the least available energy?
a)
large fish
b)
algae
c)
shark
d)
small fish
20.
In the food chain, how much energy will make it to the trophic level of the sharks if the producers have 100,000 calories?
a)
10 calories
b)
1 calorie
c)
100 calories
d)
1,000 calories
21.
The organisms in the picture can be described as a(n)
a)
biome
b)
community
c)
population
d)
ecosystem
22.
Aspects of the nonliving environment that affect the species in the environment and determine which species can live there are called
a)
ecosystems
b)
abiotic factors
c)
biotic factors
d)
keystone species
23.
A collection of populations of different species that interact is called a(n)
a)
organism
b)
population
c)
community
d)
ecosystem
24.
Carnivores represent what trophic level?
a)
producers
b)
primary consumers
c)
secondary consumers
d)
decomposers
25.
Organisms are classified into trophic levels according to
a)
where they live
b)
the source of their nutrients
c)
how much they weigh
d)
alphabetical order
26.
Organisms in the first trophic level are
a)
autotrophs
b)
primary consumers
c)
heterotrophs
d)
apex predators
100 %
