Mrs. Keadle JH Science
Name__________________________________ period _____
date assigned_____________ date due ______________ date returned _____________
Energy Flow in Ecosystems
Power Point Questions
1. Living and non-living things interact with each other in an ecosystem.
Biomass is the total mass of all living __________________________ in an area
Abiotic factors are __________________________ things
Biotic factors are ___________________________ things
2. The four major abiotic components to an ecosystem are:
a. _________________________________________
b. _________________________________________
c. _________________________________________
d. _________________________________________
3. The three major biotic factors are:
a. __________________________________________
b. __________________________________________
c. __________________________________________
4. Energy enters an ecosystem as _________________________________________.
Energy Flow in Ecosystems
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Mrs. Keadle JH Science
5. Energy flows through an ecosystem in a __________________________________.
6. Each organism has a role to play in this energy flow:
a. _______________________________________
b. _______________________________________
c. _______________________________________
7. ______________________________ make their own food and are the source of all
the _________________________ in an ecosystem.
8. List some autotrophs:
a. ___________________________
c. ___________________________
e. ___________________________
g. ___________________________
b. ________________________
d. ________________________
f. ________________________
9. Consumers cannot make their own _______________________________. They
get their energy from _____________________________ other organisms.
10. What are the three types of heterotrophs?
a. _________________________________
b. _________________________________
c. _________________________________
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Mrs. Keadle JH Science
11. What do herbivores eat? ______________________________________________
12. What do carnivores eat? ______________________________________________
13. What do omnivores eat? ______________________________________________
14. Decomposers break down ___________________________ and return the raw
materials into the ________________________.
15. List some decomposers and scavengers:
a. _________________________________
c. _________________________________
b. ________________________
d. ________________________
16. A food chain is a series of events in which one organism ____________________
another and obtains ____________________________.
The first organism on a food chain is always a ___________________________
The next organisms in the chain are ___________________________________
17. Decomposers can be at __________________ level.
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Mrs. Keadle JH Science
18. A food web consists of many ______________________________ food chains.
Organisms can play more than one role in a _____________________________
19. Organisms can be divided into _____________________________ levels.
At the bottom are_____________________________________________
Next are _______________________________ consumers which are usually
_________________________________.
Then there are _____________________________ consumers which can be
_____________________________ or _____________________________.
Finally at the top are ____________________________ consumers.
20. Label the parts of the trophic levels.
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Mrs. Keadle JH Science
21. An energy ____________________________ shows the amount of energy that
moves from one feeding level to another in a food web.
At each level upward the amount of energy _______________________ due to
use.
22. When an organism eats food, it obtains __________________________.
_________________________ of this energy is used for living
_________________________ moves up to the next trophic level when the
organism dies or is eaten.
23. The most energy is available at the _________________________________ level.
The amount of energy at the producer level determines how ________________
organisms can live in that ecosystem.
The lease amount of energy is available at the top or ______________________
consumer.
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Mrs. Keadle JH Science
24. Once an organism dies, ______________________________ take over and break
Down the material it was made of.
These nutrients are put back into the __________________________________.
_______________________ use those nutrients along with sunlight to
____________________________ that energy back into the food chain.
25. Composting is helping the natural ________________________________ process
break down waste.
Using a compost bin, we can recycle _______________________ scraps and
return those nutrients to the soil.
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