Matching: Match the correct term to its definition.
Chlorofluorocarbons ozone layer ultraviolet radiation
1. Layer in the stratosphere containing ozone, which absorbs ultraviolet radiation ____________________
2. Type of energy from the sun that can be harmful in large amounts _____________________
3. Chemicals used in some aerosol sprays, refrigerants, and some foam products _____________________
True “T” or False “F”
___ 4. The kind of oxygen we breathe can absorb ultraviolet radiation.
___ 5. Scientists know exactly what is causing the ozone layer to disappear.
___ 6. Chlorofluorocarbons are making the ozone layer thicker.
___ 7. The ozone layer acts as a shield between ultraviolet radiation and us.
___ 8. Holes in the ozone layer have been found over Antarctica and the North Pole.
___ 9. Ozone molecules destroy chlorofluorocarbon molecules.
Fill in the blank: You can find the words in your readings.
(10) ____________________ (0
3
) is a gas that forms in the atmosphere when 3 atoms of (11)
______________________ are combined.
The ozone layer is actually a band of gas located in the (12) _____________________ that has especially high concentrations of ozone molecules. This band is found between (13) ______________________ and (14)
_____________________ miles above the Earth's surface.
(15) ___________________ exhaust and industrial emissions, gasoline vapors, and chemical solvents are some of the major sources of (16) ______________________ and (17) ______________________, also known as ozone precursors. Strong (18) ______________________ and hot weather cause (19)
______________________ ozone to form in harmful concentrations in the air.
But this "(20) ______________________" ozone is gradually being destroyed by manmade chemicals called
(21) ______________________ (CFCs), halons, and other ozone depleting substances (used in coolants, foaming agents, fire extinguishers, and solvents).
One (22) ______________________ or bromine molecule can destroy (23) ______________________ ozone molecules, causing ozone to disappear much faster than nature can replace it.
Short Answer: Write correct answers to these questions on the back
24. What is the difference between “good” and “bad” ozone?
25. Why is the stratospheric ozone layer important for life on Earth?
26. How do CFC’s destroy stratospheric ozone?

Use the words to fill in the blanks. acidic cars factories basic nitrogen gases wind soil sulfur
Midwest
The amount of acid rain in an area depends on the number of (1) _______________ and (2) ____________ in the area. This is because they are the sources of (3) ________________ and (4) ______________ that become acid rain. Does acid rain fall where the pollution starts? It depends on the (5) __________________, which sometimes carries the pollution away.
When acid rain does fall, the damage it does depends partly on the kind of (6) ___________________ in the area. Some soils are already (7) ________________, and plants that grow in them can't survive when more acid is added. Other soils are (8) ___________________, and the damage is less when acid rain falls on these. As a rule, soils in the (9) _________________ are basic and soils in the northeastern states are acidic.
Use the words to fill in the blanks. sulfur car exhaust cost coal-burning public transportation scrubber
jobs car pooling coal
Acid rain is created when moisture in the air combines with nitrogen oxide to form nitric acid.
Do you know what the main source of nitrogen oxide is? It comes from (10) __________________. Two ways people can help to reduce nitric acid are by (11) ___________________ and using (12) __________________.
Another source of acid rain comes from (13) ___________________ power plants that release (14)
___________________ into the air. Power plants can help this situation in two ways. They can wash the (15)
___________________, and they can run the smoke through a (16) ___________________.
Why don't people insist that the power plants make their exhaust cleaner? Because the (17) ________________ of electricity would increase and because many people could lose their (18) ____________________.
Fill in the blank: Use the reading to find the term(s) to complete the sentences.
"Acid rain" is a broad term used to describe several ways that acids fall out of the atmosphere. A more precise term is (19) _________________ , which has two parts: (20) ___________________ and (21)
___________________.
Wet deposition refers to acidic rain, fog, (22) ___________________, dew and (23) ___________________.
Acid rain, however, is the result of (24) ___________________ and (25) ___________________ entering the atmosphere.
Scientists have also confirmed that about 2/3 of all (26) ___________________ (SO
2
) and 1/4 of all (27)
___________________ (NOx) comes from (28) ___________________ power generation that relies on burning fossil fuels like coal.

Acid rain is formed when these gases react in the atmosphere with (29) ___________________, oxygen, and other chemicals to form various acidic compounds. (30) ___________________ increases the rate of most of these reactions. The result is a mild solution of (31) ___________________ (H
2
SO
4
) and (32)
___________________ (HNO
3
).
Normal rain is slightly (33) ___________________ because carbon dioxide dissolves into it, so it has a pH of about (34) ___________________. Wisconsin Department of Natural Resources investigators consider rain with pH less than (35) ___________________ to be "acid rain." As of the year 2000, the most acidic rain falling in the US has a pH of about (36) ___________________.
A substance that is neither acidic nor basic is (37) ___________________.
The pH scale measures how (38) ___________________ or (39) ___________________ a substance is. It ranges from (40) ___________________ to (41) ___________________. A pH of (42) __________________ is neutral. A pH less than 7 is (43) ___________________, and a pH greater than 7 is (44) _________________
Wisconsin passed one of the first and strongest state acid rain control laws in the nation in (45)______ _______, making the state a leader in acid rain policy. The law required Wisconsin's major electric utility companies to reduce their sulfur dioxide emissions by (46) ________________ __ percent from 1980 emission levels by
1993.
The most recent analysis of wet acid precipitation data (1990) indicates that the annual average pH in Wisconsin ranged from (47) ____________ in the southeast to (48) ______________ in the northwest. In contrast, the annual average pH in the early 1980s ranged from (49) _________________ in southeastern Wisconsin to (50)
__________________ in the northwestern part of the state. The goal established in the state law is to raise the pH of the state's rain to (51) ________________ or greater across the state.
52. What is acid rain?
53. Why should Baraboo be concerned about acid rain when we have so little air pollution?
54. How can acid rain have a negative impact on tourism and fishing in Wisconsin?
55. Why is acid rain considered to be an international problem?