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Date
Activity
Vocabulary Activity
Environmental Enigma
After you finish reading the chapter, try this puzzle! Use the clues below to figure
out what key terms go in each space of the puzzle on the next page.
1. a symbiotic relationship in which both organisms benefit
2. the study of the interactions between organisms and their environment
3. long-term change that takes place in two species because of their close
interactions with each other
4. a group of individuals of the same species that live together in the same area
at the same time
5. two organisms that have close interactions that either help both, harm one, or
help one at no expense to the other
6. a consumer that eats only animals
7. nonliving factors in the environment
8. symbiotic relationship in which one organism benefits and the other is
not affected
9. the number of organisms an ecosystem can support
10. living factors in the environment
11. diagram that represents how energy in food flows from one organism to the next
12. consumer that eats both plants and animals
13. triangle-shaped diagram that shows the loss of energy at each level of a
food chain
14. the part of Earth where life exists
15. a consumer that eats plants
16. several populations living in the same area
17. symbiotic relationship in which one organism benefits while the other is harmed
18. diagram that represents the many energy pathways in a real ecosystem
19. the organism that is hunted by a predator
20. an organism that eats prey
21. a community of organisms and their nonliving environment
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Interactions of Living Things
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Class
Date
Vocabulary Activity continued
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Write each of the numbered letters in the correct space below to decode the
hidden message.
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G
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Holt Science and Technology
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Interactions of Living Things
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Print RESOURCE PAGE
TEACHER
Chapter Test C
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B
C
B
D
B
A
B
B
B
A
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Vocabulary Activity
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D
C
food chain
consumers
producers
food web
abiotic
biotic
population
community
mutualism
ecology
coevolution
population
symbiosis
carnivore
abiotic
commensalism
carrying capacity
biotic
food chain
omnivore
energy pyramid
biosphere
herbivore
community
parasitism
food web
prey
predator
ecosystem
LIVING THINGS INTERACT
Standardized Test
Preparation
READING
Passage 1
1. A
2. I
3. B
Passage 2
1. B
2. H
3. D
SciLinks Activity
INTERPRETING GRAPHICS
Students should identify a habitat or
ecosystem, name the organisms that make
up its populations and community, and
name the abiotic elements.
1. B
2. F
3. D
MATH
1.
2.
3.
4.
A
H
C
H
Copyright © by Holt, Rinehart and Winston. All rights reserved.
Holt Science and Technology
93
Interactions of Living Things