Key
Name __________________________________
ECOLOGY REVIEW
Period _____ Date ____________ Seat ______
Main Idea: Ecologists study environments at different levels of organization.
Write a description of each level of organization in the table. Also, provide an example for each level.
Level
1. Organism
2. Population
3. Community
4. Ecosystem
5. Biosphere
Description
Example
An individual form of life, such as a plant, animal,
bacterium, protist, or fungus.
A group of individuals that belong to the same
species and live in the same area.
An assemblage of different populaations that live
together in a defined area.
All the organisms that live in a place together with
their physical environment.
Our entire planet, all its organisms and physical
environments.
An individual worker bee.
A hive of bees.
Bees, birds, clover, trees.
Bees, birds, clover, trees, soil, rocks,
pond.
Earth
Fill in the diagram below with the Levels of Organization studied in Ecology. Use the terms from the
table above.
Organism
Population
Community
Ecosystem
Biosphere
Main Idea: An ecosystem includes both abiotic and biotic factors. Producers provide energy for
other organisms in an ecosystem.
Complete the following sentences with the correct term from the list below
autotrophs
eating
nonliving
abiotic
living
temperature producers
moisture
plants
animals
biotic
consumers
heterotrophs nonliving
living
nonliving
6. All ecosystems are made up of ________________
and ___________________
components.
Biotic
animals
plants
7. ______________
factors are living things, such as _______________
or _______________.
rocks, water
8. ______________factors
Abiotic
are nonliving things, such as wind, ______________,
temperature
or ______________.
moisture
Autotrophs
nonliving
9. ____________________
are organisms that get their energy from ___________________
resources,
meaning they make their own food. These organisms are also called ______________________.
producers
Heterotrophs
eating
10. ___________________
are organisms that get their energy by __________________other
consumers
organisms. These organisms are also called _________________________.
1
Key
Name __________________________________
ECOLOGY REVIEW
Period _____ Date ____________ Seat ______
11. Why are producers so important to an ecosystem?
Producers make energy-rich compounds that other organisms need to survive. Producers
__________________________________________________________________________________
are essential for the flow of energy through the biosphere.
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
KEY CONCEPT: Food chains and food webs model the flow of energy in an ecosystem.
Choose the correct term from the box below to fit each description.
carnivore
herbivore
secondary consumer
decomposer
detritivore
omnivore
primary consumer
tertiary consumer
trophic levels
herbivore
(Grasshopper)
12. I eat only plants. I am a(n) ___________________________.
carnivore
(Spider)
13. I eat only other animals. I am a(n) _______________________.
(Mouse)
14. I eat both plants and animals. I am a(n) _____________________.
omnivore
(Earthworm)
15. I eat dead organic matter. I am a(n) _______________________.
detritivore
16. I break down organic matter into simpler compounds. I am a(n) ______________________.
decomposer (Mushroom)
17. I am the first consumer above the producer level. I am a(n) ____________________.
primary consumer (Rabbit)
18. I am a carnivore that eats herbivores. I am a(n) __________________________.
secondary consumer
(Coyote)
19. I am a carnivore that eats other carnivores. I am a(n) __________________________
. (Cougar)
tertiary consumer
trophic levels
20. The levels of nourishment in a food chain are called _______________________.
21. How is a food web different from a food chain?
Each trophic level in a food chain contains only one organisms, like grass → rabbit →
__________________________________________________________________________________
hawk, in a sequence. In food webs, many different food chains interact with one another to
__________________________________________________________________________________
form more complex feeding interactions.
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
2
Key
Name __________________________________
ECOLOGY REVIEW
Period _____ Date ____________ Seat ______
Complete the Food Chains Worksheet
Circle the organisms that complete the food chains below.
3
Key
Name __________________________________
ECOLOGY REVIEW
Period _____ Date ____________ Seat ______
Food Chain Worksheet
Read the passages then answer the questions below.
The arrows represent the
direction of energy flow between organisms.
energy source (sun, deep sea vents, chemicals)
autotrophs
producers
herbivores
primary consumers
top predator
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Key
Name __________________________________
ECOLOGY REVIEW
Period _____ Date ____________ Seat ______
Food Web Worksheet
Read the passage then answer the questions below.
Producers (autotrophs)
consumers (heterotrophs)
producers
autotrophs
a producer (autotroph)
herbivores
carnivores
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