Download Environmental Science Chapter 1

Name: ________________________ Class: ___________________ Date: __________
ID: A
Environmental Science Chapter 1: Populations and Communities
Modified True/False
Indicate whether the sentence or statement is true or false. If false, change the identified word or phrase to make the
sentence or statement true.
____
1. A tapeworm living inside a wolf’s body is a predator.
____
2. All of the members of a community belong to the same species.
____
3. Bees and flowers are biotic factors in an ecosystem.
____
4. Individuals decrease the size of a population when they emigrate from it.
____
5. Population size generally increases if the birth rate is greater than the death rate.
____
6. The carrying capacity is the smallest number of individuals in a population that can live in one area.
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
____
7. The place where an organism lives and that provides the things the organism needs is called its
a. habitat.
b. population.
c. species.
d. community.
____
8. Which of the following is an example of a population?
a. the cats and dogs in your neighborhood
b. the bushes and grass in a park
c. the rocks in a rock collection
d. the gray wolves in a forest
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Name: ________________________
____
ID: A
9. Counting the number of organisms in a small area and multiplying to estimate the number in a larger area is
called
a. direct observation.
b. mark and recapture.
c. population density.
d. sampling.
____ 10. The major way in which new individuals are added to a population is through
a. sampling.
b. the birth of offspring.
c. mark and recapture.
d. emigration.
____ 11. A group of antelope leaving the herd in search of better grassland is an example of
a. immigration.
b. emigration.
c. increasing birth rate.
d. decreasing death rate.
____ 12. Which term refers to an environmental factor that prevents a population from increasing?
a. biotic factor
b. abiotic factor
c. immigration
d. limiting factor
____ 13. The largest population that an environment can support is called its
a. carrying capacity.
b. limiting factor.
c. birth rate.
d. death rate.
____ 14. An organism’s particular role, or how it makes its living, is called its
a. carrying capacity.
b. ecosystem.
c. competition.
d. niche.
____ 15. The behaviors and physical characteristics of species that allow them to live successfully in their
environment are called
a. habitats.
b. limiting factors.
c. biotic factors.
d. adaptations.
____ 16. The struggle between organisms to survive in a habitat with limited resources is called
a. competition.
b. predation.
c. symbiosis.
d. parasitism.
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Name: ________________________
ID: A
____ 17. A close relationship between two species that benefits at least one of the species is called
a. natural selection.
b. symbiosis.
c. adaptation.
d. competition.
____ 18. An early winter frost preventing further growth in a tomato garden is an example of
a. carrying capacity.
b. a limiting factor.
c. a biotic factor.
d. indirect observation.
____ 19. All of the following are examples of limiting factors EXCEPT
a. food.
b. soil.
c. space.
d. weather conditions.
____ 20. An organism’s habitat must provide all of the following EXCEPT
a. food.
b. water.
c. predators.
d. shelter.
____ 21. By hunting at different times of day, hawks and owls are able to reduce
a. predation.
b. competition.
c. adaptation.
d. parasitism.
____ 22. Which of the following describes an interaction in which one organism kills and eats another?
a. competition
b. symbiosis
c. predation
d. mutualism
____ 23. Which of the following is an example of a predator adaptation?
a. a porcupine’s needles
b. a shark’s powerful jaws
c. a frog’s bright colors
d. a plant’s poisonous chemicals
____ 24. All the different populations that live together in an area make up a(n)
a. organism.
b. community.
c. species.
d. ecosystem.
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Name: ________________________
ID: A
____ 25. When a flea is living on a dog, the dog is the
a. parasite.
b. host.
c. predator.
d. prey.
____ 26. Mutualism, commensalism, and parasitism are the three types of
a. symbiotic relationships.
b. predation.
c. competition.
d. prey adaptations.
____ 27. A hawk building its nest on an arm of a saguaro cactus is an example of
a. commensalism.
b. mutualism.
c. parasitism.
d. predation.
Completion
Complete each sentence or statement.
28. The part of an ecosystem where an organism lives and feeds is called the organism’s
____________________.
29. All the biotic and abiotic factors in an area together make up a(n) ____________________.
30. Prairie dogs, snakes, and grass make up a level of ecological organization called a(n)
____________________.
31. All the prairie dogs in one area are an example of a(n) ____________________.
32. Water, sunlight, and soil are ____________________ factors in an ecosystem.
33. Two abiotic factors that are needed for photosynthesis are sunlight and ____________________.
34. The ____________________ method of estimating involves multiplying the number of organisms in a small
area to find the number in a larger area.
35. Observing animal tracks is an example of ____________________ observation, which is used to estimate
population size.
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ID: A
Environmental Science Chapter 1: Populations and Communities
Answer Section
MODIFIED TRUE/FALSE
1.
2.
3.
4.
5.
6.
F, parasite
F, population
T
T
T
F, largest
MULTIPLE CHOICE
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
A
D
D
B
B
D
A
D
D
A
B
B
B
C
B
C
B
B
B
A
A
COMPLETION
28.
29.
30.
31.
32.
33.
habitat
ecosystem
community
population
Abiotic [or nonliving]
water
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ID: A
34. sampling
35. indirect
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