Class Work sheet #2 lesson 2-Keeping the air clean
Subject
Name
Date
Grade
12
Cluster
Environmental Health
HST
I-MCQ
1.During the past 30 years, why has pollution from motor vehicles been a growing problem in the
United States?
A
Because the typical car today emits more pollutants than the
typical car of 30 years ago.
B
Because we stopped inspecting automobiles for pollution.
C
Because automobiles no longer run on gasoline.
D
Because the use of motor vehicles has more than doubled during
this time
2. Which of the following are pollutants that motor vehicles add significantly to the atmosphere?
A
Carbon dioxide and oxygen
B
Carbon monoxide, many hydrocarbons, and nitrogen oxides
C
Benzene, toluene, and larger hydrocarbons
D
Chlorofluorocarbons
3.Why does a thermal inversion worsen air pollution?
A
Motor vehicles pollute more when run in warmer air.
B
Pollution becomes more toxic as it is heated.
C
Pollution spreads from cool air into warm air.
D
Pollution is trapped in a cool layer of air underneath a warm layer
of air
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4.What gas is important in Earth’s upper atmosphere, but harmful when found at ground level?
A
Ozone
B
Oxygen
C
Nitrogen
D
Sodium
5.To report the healthiness of the air in many communities, the Environmental Protection Agency
(EPA) uses a measurement called the ______.
A
Ozone Index (OI)
B
Particulate Pollutant Concentration (PPC)
C
Air Quality Index (AQI)
D
Spectrophotometric Index (SI)
6.What is the significant danger to the environment of chlorofluorocarbons (CFCs), which once
were common in aerosol sprays and other products?
A
CFCs add gases to the air that increase the greenhouse effect.
B
CFCs act like secondhand smoke from tobacco products, causing
lung cancer and other lung diseases.
C
CFCs dissolve in water and pollute lakes, rivers, and streams.
D
CFCs harm the ozone layer, which protects us from harmful UV
rays of the sun.
7.Motor vehicles, power plants, and factories all release gases that contribute to the greenhouse
effect. What would happen if this effect becomes too strong?
A
Earth’s temperatures would increase.
B
Earth’s temperatures would decrease.
C
The sun would shine brighter and hotter.
D
The sun would shine darker and colder.
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8.Should the greenhouse effect become stronger, scientists predict that Earth’s oceans would _____.
A
become too warm to support life
B
become too cold to support life
C
rise over current coastlines
D
shrink as land expanded
9.Scientists are observing an ongoing, gradual increase in Earth’s temperatures, an event called
_____.
A
the greenhouse effect
B
global warming
C
polar ice capping
D
land expansion
10.One simple way you can help reduce global warming is to _____.
A
take trips in automobiles, instead of walking
B
move to a distant suburb or rural area
C
eat a balanced diet
D
plant and care for trees
11.If everyone in an office experiences headaches, scratchy eyes, coughing, or dizziness, they likely
are suffering from _____.
A
sick building syndrome
B
ozone layer depletion
C
ozone poisoning
D
radon poisoning
12.What is a poisonous, radioactive gas that may seep up from the ground and become trapped in
buildings?
A
Ozone
B
Carbon dioxide
C
Sodium chloride
D
Radon
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13.Breathing fibers of which building material, now banned, increases the risk of lung cancer?
A
Bricks and mortar
B
Stucco
C
Asbestos
D
Fiberglass
14.Breathing which colorless, odorless gas is the cause of more deaths in the United States than
any other poison?
A
Ozone
B
Carbon dioxide
C
Carbon monoxide
D
Nitrogen dioxide
15.Leaking chimneys, faulty furnaces, and poorly maintained space heaters and stoves can all
produce which poisonous gas?
A
Ozone
B
Carbon dioxide
C
Carbon monoxide
D
Radon
16.Which toxic metal was once used in paint, poisoning young children who ate paint chips?
A
Iron
B
Lead
C
Sodium
D
Radon
17.Along with benefits to your own health, what is a good reason to avoid tobacco products?
A
You help protect the ozone layer.
B
You help keep the air clean.
C
You help protect Earth’s oceans and water supply.
D
You help stop pollution from radon gas.
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18.Is it safe to run a car or lawn mower inside a closed garage?
A
Yes. Fumes from cars and lawn mowers are not toxic.
B
Yes, if you only run the car or lawn mower for a short period of
time.
C
Yes, if you do not directly breathe in the fumes.
D
No. Fumes from cars and lawn mowers contain toxic gases. They
should never be run in a closed garage.
II-Directions: Match the definitions in Column I with the terms in Column II. Write the correct letter
in each blank
.
Column I
1. ________ a shield far above Earth’s surface that protects all living things
Column II
from ultraviolet radiation
A air pollution
2. _______tiny amounts of soot, dirt, and pollen in the air
B Air Quality Index
3.________ the total of the levels of five different pollutants
(AQI)
4. ________an ongoing increase in Earth’s temperature
C global warming
5.________ the trapping of heat by carbon dioxide and other gases in the air D greenhouse effect
6. _______an illness caused by indoor air pollution
E motor vehicle
7. _______a condition that occurs when a layer of warm air forms above a
emissions
cooler layer of air, trapping pollution in the cooler layer of air
F ozone layer
8. _______contamination of air with undesirable gases, dust, smoke, and
G particulates
chemicals
H sick building
9. _______chemicals released into the air as a result of burning fuel in cars
syndrome
10. ______combination of smoke and fog
I smog
J thermal Inversion
III-Directions: Complete the lesson outline below by filling in the blanks.
How Air Becomes Polluted
1. The sources of air pollution include:
a.__________________________________________________ ,
b.________________________________________________ , and
c._________________________________________________ .
2. Aground-level chemical reaction between air pollutants and the light energy from the sun produces the
gaseous pollutant__________________________________ ,which is found in smog and is harmful to human health
when inhaled.
The Changing Atmosphere
3. Over time, exposure to ultraviolet radiation can cause health problems such as__________________ and
____________________________.
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4. Now banned in aerosol products in the United States_____________________________, damage the ozone layer
when released.
5. When motor vehicles____________________________ , they contribute to the greenhouse effect.
6. Some amount of greenhouse effect is necessary, but too strong of a greenhouse effect could cause
______________________, or an ongoing increasing of Earth’s temperature.
Indoor Air Pollution
7. In addition to building materials, cleaning fluids, and other household chemicals________________________,
and are____________________________ causes of indoor pollution.
8. Irritation or illness may be caused by chemicals that were once used in building materials, such
as_______________________ , which is now banned, and____________________________ .
Clean Air
9. One way to help keep the air clean is to limit the use of________________________ by walking or riding bikes
when possible.
10. Inside the home, the use of energy-efficient______________________________cuts down on energy use, which
helps minimize air pollution.
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