Communities Key Concept Builder LESSON 3 Key Concept

Name
Date
Class
C21L3
Key Concept Builder
LESSON 3
Communities
Key Concept What defines a community?
Directions: Put a check mark under the column(s) that each item describes.
Description
Habitat
Niche
1. The place within an ecosystem where an organism lives
2. Provides the resources an organism needs
3. The ways an organism uses resources
4. Shared by many species of organisms
5. Usually unique to a species
6. Helps species survive
Directions: Respond to each statement on the lines provided.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
7. Write a definition of community.
8. Explain how it is possible for different species to survive in the same habitat.
9. Identify two organisms that have different niches in the same habitat.
Populations and Communities
55
Name
Date
Class
C21L3
Key Concept Builder
LESSON 3
Communities
Key Concept What defines a community?
Directions: Respond to each statement in the space provided.
Energy Roles
Write the definition for each term.
Give an example.
2.
3. Consumer:
4.
5. Herbivore:
6.
7. Carnivore:
8.
9. Omnivore:
10.
11. Detritivore:
12.
56
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
1. Producer:
Populations and Communities
Name
Date
Class
C21L3
Key Concept Builder
LESSON 3
Changing Populations
Key Concept How do the populations in a community interact?
Directions: Answer each question or respond to each statement on the lines or in the space provided.
1. What is a food chain?
2. Draw an example below of a five-part food chain that begins with the Sun and ends
with detritivores. Include a predator-prey relationship in your chain. Use the names of
the organisms and arrows to show the direction that energy flows.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
3. Rewrite your food chain using the role of each organism, such as producer and
carnivore.
4. Some species in a community have a predator-prey relationship. What does this mean?
5. Which combination is a predator-prey relationship in your food chain above? Which
one is the predator, and which one is the prey?
Populations and Communities
57
Name
Date
Class
C21L3
Key Concept Builder
LESSON 3
Communities
Key Concept How do the populations in a community interact?
Directions: On each line, write the term that correctly completes each sentence.
1. Three types of relationships within a community are predator-prey,
, and
.
2. Members of some populations work together for their survival in
relationships.
3. A close relationship between two species that involves an exchange of energy is
called
.
Directions: Write the phrase that correctly completes each definition. Then write an example of each symbiotic
relationship in the space provided.
Type of Symbiotic
Relationship
Definition
Example
4. a symbiotic relationship in
which ...
5.
Commensalism
6. a symbiotic relationship in
which ...
7.
Parasitism
8. a symbiotic relationship in
which ...
9.
58
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Mutualism
Populations and Communities