Name ______________________________ Class ___________________ Date __________________
Skills Worksheet
Test Prep Pretest
In the space provided, write the letter of the term or phrase that best completes
each statement or best answers each question.
_____ 1. When sulfur dioxide is released into the atmosphere, the result often is
a. ozone.
c. acid rain.
b. CFCs.
d. ultraviolet radiation.
_____ 2. Global levels of carbon dioxide are
a. increasing.
b. remaining constant.
c. decreasing.
d. too low to be measured accurately.
_____ 3. All of the following are considered nonrenewable resources except
a. oil.
b. wood.
c. coal.
d. natural gas.
_____ 4. Temperatures on Earth are kept stable due to
a. global warming.
c. ozone buildup.
b. acid rain.
d. the greenhouse effect.
_____ 5. The increase in global temperatures over the last 45 years is associated
with
a. decreased CFCs.
b. increased carbon dioxide.
c. acid rain.
d. the greenhouse effect.
_____ 6. Efforts to reduce pollution include all of the following except
a. restrictions on the use of DDT.
b. use of scrubbers in industry.
c. limits on CFC use.
d. the closing of all coal-burning facilities.
_____ 7. Cleaning up damaged habitats is a function of which technique for solving
environmental problems?
a. restoration
b. conservation
c. reduction
d. ecotourism
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The Environment
Name ______________________________ Class ___________________ Date __________________
Test Prep Pretest continued
Complete each statement by writing the correct term or phrase in the space
provided.
8. The ozone layer has been damaged by the use of ______________________, used
as coolants in refrigerators.
9. The insulating effect of various gases in Earth’s atmosphere is known as the
______________________ ______________________.
10. The increase in global temperatures is called ______________________
______________________.
11. Examples of chemical pollutants released into the global ecosystem by the
agriculture industry are ______________________ and
______________________.
12. Fossil fuels are formed when ______________________ are buried by layers of
sediments that cause intense heat and pressure.
13. Fertilizer runoff may cause ______________________
______________________ that deplete the amount of ______________________
in the water.
14. Washing cars and watering lawns less often and using efficient faucets are ways
to ______________________ water usage.
15. The installation of ______________________ on factory smokestacks has
reduced sulfur dioxide and carbon monoxide emissions by 30 percent.
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
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The Environment
Name ______________________________ Class ___________________ Date __________________
Test Prep Pretest continued
Read each question, and write your answer in the space provided.
16. How does the presence of the ozone layer affect life on Earth?
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
17. Explain the relationship between the greenhouse effect and global warming.
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
18. Explain how runoff from farms and golf courses can affect organisms in nearby
streams.
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
19. Describe four techniques for conserving soil.
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
20. Explain the relationship between habitat destruction and loss of biodiversity.
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
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The Environment
Name ______________________________ Class ___________________ Date __________________
Answer Key:
Test Prep Pretest
1. c
2. a
3. b
4. d
5. b
6. d
7. a
8. CFCs
9. greenhouse effect
10. global warming
11. pesticides, fertilizers
12. organisms
13. algal blooms, oxygen
14. reduce
15. scrubbers
16.The ozone layer protects life on Earth from ultraviolet radiation.
17.Greenhouse gases, such as carbon dioxide, reradiate heat to Earth and keep it warm. Studies show a
relationship between increasing amounts of carbon dioxide in the atmosphere and increasing
temperatures, an effect called global warming.
18.Runoff that contains excess nutrients may cause algal blooms in streams. The algae use up the
oxygen in the water, and other organisms suffocate.
19. Terracing prevents soil erosion by creating a series of flat steps. Cover crops restore soil nutrients.
Crop rotation slows down nutrient depletion. Contour plowing creates a series of dams that follow
the contours of the ground and prevent erosion.
20. When habitats are destroyed, there is less space and fewer resources to support as many species;
thus, biodiversity decreases.
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Biology
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The Environment