WorksheetsUnit 7 Lesson 2: Energy and Matter in an Ecosystem
Total questions: 25
Worksheet time: 13mins
Name
Class
Date
1.
What is energy?
a)
anything that takes up space
b)
anything that has mass
c)
the ability to conduct current
d)
the ability to do work
2.
Which type of organism would be in Section 2 of the pyramid?
a)
autotrophs
b)
producers
c)
herbivores
d)
producers
3.
Which statement supports the ecosystem represented by the food chain, if it were to be represented in an energy pyramid?
a)
It can support more panthers than deer.
b)
It can support more deer than panthers
c)
It can support the same number of panthers as it can deer.
d)
The amount of grass does not affect the ecosystem.
4.
Which of the following statements about energy pyramids is true?
a)
The largest proportion of organisms are found in the top level.
b)
The smallest proportion of organisms are found in the top level.
c)
Carnivores are most likely to be found in the bottom level.
5.
Which of these statements is true of ecosystems?
a)
Animals do not travel from one ecosystem to another ecosystem.
b)
The total amount of energy in an ecosystem does not change.
c)
Air cannot be used by organisms once the air moves out of an ecosystem.
d)
Matter lost by one ecosystem is gained by the surrounding environment.
6.
Unicellular organisms include bacteria, some algae, and some animals. They live in virtually every environment on the planet. Which of the following statements BEST describes the ratio of unicellular animals to multi-cellular animals?
a)
Multicellular organisms outnumber unicellular organisms only in terrestrial environments.
b)
Unicellular and multicellular organisms exist in about the same number in both aquatic and terrestrial environments.
c)
Unicellular organisms outnumber multicellular organisms in both aquatic and terrestrial environments.
d)
Multicellular organisms outnumber unicellular organisms only in aquatic environments
7.
Barnacles are crustaceans that attach themselves to large marine animals such as whales. The barnacles are transported to new feeding grounds, usually without affecting the whale. This process is an example of which of the following?
a)
parasitism
b)
predation
c)
commensalism
d)
mutualism
8.
Which of the following cycles does not have a gas form?
a)
Carbon
b)
Water
c)
Nitrogen
d)
Phosphorous
9.
Each organism has its own role in an ecosystem. Organisms can be producers, consumers, or decomposers. Which of these organisms can be classified as a decomposer?
a)
bee
b)
flower
c)
mushroom
d)
turtle
10.
Why is nitrogen fixation important to the law of conservation of mass and energy?
a)
It removes phosphorous from the soil and returns to the atmosphere
b)
It decomposes carbon into a from that plants can absorb
c)
It returns nitrogen to a form that plants can absorb
d)
none of these
11.
A freshwater marsh is type of ecosystem. Grasses, fish, wading birds, frogs, and alligators live together in freshwater marshes. Pieces of decaying material sink to the bottom of the marsh. In which of these places can carbon be found in the marsh?
a)
In the atmosphere and water only
b)
In living things only
c)
In living things and decaying matter only
d)
In the atmosphere, water, living things, and decaying materials
12.
Which type of organism would be in Section 1 of the pyramid?
a)
Heterotroph
b)
Producer
c)
Consumer
d)
Decomposer
13.
Which type of diagram illustrates the flow of energy through a group of particular species?
a)
food web
b)
food chain
c)
energy pyramid
d)
energy plate
14.
Which type of diagram illustrates the flow of energy through a whole community or ecosystem?
a)
food web
b)
food chain
c)
energy pyramid
d)
energy plate
15.
Which type of diagram illustrates the distribution of energy in an ecosystem?
a)
food web
b)
food chain
c)
energy pyramid
d)
energy plate
16.
In which of the following populations is the least energy concentrated?
a)
plants
b)
rabbits
c)
snakes
d)
hawks
17.
In which of the following populations is the most energy concentrated?
a)
plants
b)
rabbits
c)
snakes
d)
hawks
18.
Which type of organism in this ecosystem uses 900 kcal for their own life processes?
a)
plants
b)
rabbits
c)
snakes
d)
hawks
19.
What are the primary consumers in this food chain?
a)
owl
b)
mouse
c)
grasshopper
d)
grass
20.
Which of the following populations does the wolf eat?
a)
dragonfly
b)
corn
c)
frog
d)
rat
21.
Which of the following serves as a secondary consumer in the food web shown?
a)
dragonfly
b)
butterfly
c)
mangoes
d)
python
22.
What happens to matter on Earth?
a)
it gets created by producers
b)
it gets held by each organism
c)
it gets destroyed by decomposers
d)
it gets transferred from one organism to another
23.
Which of the following processes does NOT return carbon dioxide to the atmosphere?
a)
burning fossil fuels
b)
photosynthesis by producers/autotrophs
c)
decomposition by decomposers
d)
cellular respiration by consumers
24.
Based on the diagram of the nitrogen cycle shown below, how does nitrogen first enter the food chain?
a)
Primary consumers eat nitrogen-containing green plants.
b)
Producers absorb nitrogen/nitrates from the soil by their roots
c)
Decomposers break down nitrogen-containing waste material from primary consumers
d)
Decomposers break down nitrogen-containing reamins of green plants and primary consumers
25.
How is carbon exchanged between the biosphere and the atmosphere?
a)
Plants and animals remove carbon dioxide by cellular respiration, and plants release it by photosynthesis
b)
Plants and animals release carbon dioxide by cellular respiration, and plants remove it by photosynthesis
c)
Nitrogen-fixing bacteria remove carbon from the biosphere, and denitrifying bacteria release it into the atmosphere
d)
denitrifying bacteria remove carbon dioxide from the biosphere, and nitrogen-fixing bacteria release it into the atmosphere
100 %
