Name ____________________________________________________
Period _______
Ecosystem Practice
Organism
1. Use the table to the right to draw a four-member food chain.
Label the producer and the levels of consumers.
frog
rabbit
owl
Food Source
grasshopper
grass
snake, rabbit,
mouse
grass
photosynthesis
mouse
grass
snake
frog, mouse
2. Use all of the organisms in the table to draw a food web.
Label the producers and levels of consumers.
grasshopper
grass
mushrooms
detritus
3. Use the organisms in your food web to fill in the energy pyramid. Label each level
of the pyramid.
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Name ____________________________________________________
Period _______
4. Which level of the pyramid has the most energy available?
5. Where do the organisms at the bottom layer of the pyramid get their energy?
6. Which organism in your food web is a decomposer? Why are decomposers
important?
7. Which organism in the food web to the right
is sometimes a first-level consumer and
sometimes a second-level consumer?
EXPLAIN.
8. Choose one food chain in the web and
diagram it. Label the producer and levels of consumers.
9. Draw an energy pyramid for the food chain you chose.
10. What happens to the amount of available energy as you move up each level of the
pyramid? BE SPECIFIC.
11. Why are there fewer organisms at the top of the pyramid than at the bottom?
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Name ____________________________________________________
Period _______
12. For each ecosystem, create a food web by filling in the arrows that trace the transfer
of energy from the sun to the top-level consumer. Label the producers and levels of
consumers.
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Name ____________________________________________________
Period _______
13. Using the energy pyramid below, create a food web with eight consumers. Use the
water plants as the producers.
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Name ____________________________________________________
Period _______
14. In the food pyramid above, 80,000 kcal of energy are produced by the organisms at
the bottom level. Approximately how much of that energy will be available to the:
a. Rats?
b. Primary consumers?
c. Beetle larvae?
d. Quaternary consumers?
e. Snakes?
Use the food web at the right to answer
questions 15-20 in COMPLETE SENTENCES.
15. How many food chains make up this food web?
Diagram each food chain.
16. Which organism is an herbivore?
17. Which organism is an autotroph?
18. Which organism is a third-level consumer?
19. Name the second-level consumer(s).
20. List the carnivore(s).
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Name ____________________________________________________
Period _______
21. List at least seven biotic factors and seven abiotic factors from the marine
ecosystem below.
Biotic:
Abiotic:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
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Name ____________________________________________________
Period _______
22. Complete the table by identifying the kind of relationship described on the left, and
explain your answer.
Description of relationship
Kind of relationship/explanation
a. A Nile crocodile opens its mouth and waits
for an Egyptian plover. The plover hops in
the crocodile’s mouth and eats the leeches
and other parasites from the crocodile’s
teeth, gums and tongue.
b. In the Great
Lakes, a sea
lamprey
uses its
suction disk
mouth filled
with sharp teeth to attach to a fish, puncture
its skin, and drain its body fluids.
c. Black bears and squirrels
both eat nuts. A squirrel
will bury its nuts in a
cache, but the bear, with
its superior sense of
smell, easily finds the
cache and steals the nuts.
d. A cat
watches as
a mouse
scurries
through a
meadow,
looking for
food. Suddenly, the cat pounces on the
mouse. The cat kills and eats the mouse.
e. As the elephants in a savanna biome walk
and graze, they disturb insects in the grass.
Birds follow the
elephants and
eat the insects
from the grass.
The elephants
also lead the
birds to water.
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