Mrs.Keadle JH Science
Name__________________________________ period _____
date assigned_____________ date due ______________ date returned _____________
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1. Look at the poster on your desk.
What do you think is on the poster? ___________________
2. Using a ruler, measure the following lengths on the poster in centimeters (remember,
scientists use the metric system).
Height of the triangle ___________________
Length of the base _____________________
Length of the sides _____________________
Side length
height
base
3. Take the “Land” cards out of the bag. As a table, sort through them and place them
on the poster where you think they belong. Write the name or on the pyramid below.
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Mrs.Keadle JH Science
Directions: As a table, take out the “Land” cards and lay them on your table where you
can see them. Remove the cards without pictures and set them to the side. With your
group, arrange the pictures to show a food web then diagram the web on the paper.
Don’t forget to draw the arrows to show the energy flow through the web (hint: arrow
points to the animal getting the energy).
LAND
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Mrs.Keadle JH Science
4. Take the “Aquatic” cards out of the bag. As a table, sort through them and place
them on the poster where you think they belong. Write the name or description on
the pyramid below.
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Mrs.Keadle JH Science
Directions: As a table, take out the “aquatic” cards and lay them on your table where
you can see them. Remove the cards without pictures and set them to the side. With
your group, arrange the pictures to show a food web then diagram the web on the
paper. Don’t forget to draw the arrows to show the energy flow through the web (hint:
arrow points to the animal getting the energy).
AQUATIC
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Mrs.Keadle JH Science
Directions: Answer the following questions. The Energy Flow Power Point will
help you.
5. Describe how energy enters an ecosystem? _______________________________
___________________________________________________________________
6. What is a producer? ___________________________________________________
___________________________________________________________________
___________________________________________________________________
7. What is another name for a producer? ____________________________________
8. What is a consumer? __________________________________________________
___________________________________________________________________
___________________________________________________________________
9. What is another name for a consumer?____________________________________
10. What do first level (primary) consumers eat? ______________________________
11. What do second level (secondary) consumers eat? _________________________
__________________________________________________________________
__________________________________________________________________
12. Are there very many third level (tertiary) consumers? ______ Why? ____________
__________________________________________________________________
__________________________________________________________________
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Mrs.Keadle JH Science
Use the desert food web below to answer the following questions:
13 How is this ecosystem MOST likely to be affected by a large increase in the number of rats?
A
The snake population will decrease.
B There will be an increase in the number of snakes, coyotes and hawks.
C There will be a decrease in the number of coyotes and hawks.
D There will be an increase in the number of cacti and sagebrush plants.
14 Who are the producers?
A
cacti and sagebrush
B
hawks and coyotes
C ants and tarantulas
D rats and snakes
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Mrs.Keadle JH Science
15 Which of the following organisms can
utilize photosynthesis?
I. animals
A
II. plants
16 What happens to the solar energy
absorbed by plants during
photosynthesis?
III. fungi
A It is recycled by plants and returned
to the atmosphere.
I and II
B I and III
C II and III
B It is converted into oxygen and
glucose
C It is stored as heat within the plant
for cellular functions
D II only
D It is converted into mechanical energy
17 Michigan’s Isle Royale is a small island in the northwestern part of Lake Superior which is
home to a few thousand moose and 20-50 wolves. Wildlife scientists have studied the island’s
food chains for years. During the 1980’s, scientists noticed that as the old moose population
increased, the number of wolves increased, and as the numbers of old moose decreased, the
number of wolves decreased.
What can be concluded from this passage?
A
Wolves prey on older moose.
B Young moose are protected by their mothers.
C Vegetation on Isle Royale decreases as the moose population ages.
D Wolves do not prey on female moose and their calves.
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Mrs.Keadle JH Science
Extension:
Read the following information then answer the questions.
When a plant or animal dies, it leaves behind nutrients and energy in the organic
material that made up its body. Scavengers can feed on the carcass, but they leave
behind a large amount of unused energy and nutrients.
This unused energy is found in the form of uneaten bones, feathers, exoskeletons, fur,
wood and feces. Decomposers complete the process by changing this remaining
organic matter into carbon dioxide and nutrients. Some of the nutrients include nitrogen,
phosphorous and magnesium. Plants and algae can use these nutrients which recycles
them back into the ecosystem.
18. What are decomposers?
19. What are three examples of decomposers?
20. Where do you think they should be added to a food web or chain?
21. What would happen in the ecosystem if there were no decomposers?
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