The Air Test

Halons and CFC's both _______. a. inhibit ozone formation b. cause ozone formation in the troposphere c. destroy ozone in the stratosphere d. cause excess ozone formation in the stratosphere

C

Ozone is formed when _______. a. two oxygen molecules combine b. an individual oxygen atom combines with an oxygen molecule c. ultraviolet radiation breaks apart four oxygen molecules d. oxygen molecules are broken into separate atoms

C

What environmental condition contributed to the heat wave experienced in Europe and the thousands of deaths in France? a. polluted water b. sewage c. air pollution d. a and b

C

Which of the following is a health risk associated with ground-level ozone? a. cataracts b. skin cancer c. respiratory illness d. all of the above

C

How is good (stratospheric) ozone formed? a. combining an oxygen molecule (O2) an atom of chlorine (Cl) b. combining a single oxygen atom (O) with an oxygen molecule (O2) c. combining two single oxygen atoms d. breaking apart an oxygen molecule

A

What layer of the atmosphere is the most vital for supporting life on Earth? a. troposphere b. stratosphere c. mesosphere d. thermosphere

A

Which of the following is a possible consequence of ozone layer depletion on living organisms? a. increased exposure to ground-level ozone b. decreased levels of ultraviolet radiation in the troposphere c. increased levels of ultraviolet radiation absorption in the stratosphere d. none of the above

A

Which two layers of the atmosphere are responsible for the majority of the solar radiation absorption? the stratosphere and the troposphere the stratosphere and the thermosphere the mesosphere and the thermosphere the troposphere and the mesosphere

A

Acid rain occurs when sulfur dioxide in the atmosphere is oxidized in the presence of nitrogen dioxide. Acid rain is an example of _______. a. a primary pollutant b. a secondary pollutant c. a tertiary pollutant d. none of the above

B

The _______ is responsible for absorbing the most UV radiation. a. troposphere b. stratosphere c. mesosphere d. thermosphere

B

Which of the following is an ozone depleting substance (ODS)? a. ultraviolet radiation b. chlorofluorocarbon (CFC) c. biogeochemical cycle d. none of the above

B

Which of the following is not a possible cause for air pollution? a. volcanoes b. industry c. combustion d. none of the above

B

Why are small quantities of chlorofluorocarbons so harmful to the ozone layer? a. The chlorofluorocarbons act like ultraviolet radiation causing large amount of ozone to be produced. b. The chlorine from the chlorofluorocarbons reacts with free molecules of oxygen causing a stop in ozone production. c. Free oxygen atoms can replace the chlorine in chlorine monoxide, releasing a free atom of chlorine which can then recombine with an oxygen atom in ozone, destroying more ozone. d. Chlorofluorocarbons absorb ultraviolet radiation, preventing the formation of ozone.

C

How are individual atoms of oxygen formed in the stratosphere? a. Individual oxygen atoms are formed when oxygen molecules collide with each other. b. Individual oxygen atoms are formed in the sun. c. Individual oxygen atoms are formed during photosynthesis. d. Individual oxygen atoms are formed when UV rays strike oxygen molecules.

D

How does the absorption of ultraviolet radiation by the ozone layer help sustain life? a. This process helps maintain the temperature of the Earth. b. It keeps a low level of harmful ultraviolet radiation from reaching living organisms. c. This process keeps ozone concentrations in the troposphere at lower levels. d. All of the above are true.

D

How does the ozone layer affect life on Earth? a. causes respiratory illness b. increases photosynthesis in plants c. causes damage to living tissue d. filters out harmful ultraviolet radiation

D

The ozone layer helps to sustain terrestrial life by __________. a. absorbing incoming UV radiation b. keeping levels of ozone in the troposphere low c. maintaining the Earth's temperature structure d. all of the above

D

Air pollution affects everyone equally. T o F

F

Air pollution only occurs as a result of human activity. T o F

F

All the radiation absorbed in the Earth's atmosphere is absorbed in the stratosphere. T o F

F

The environmental and health risks associated with ground-level ozone are greater than the environmental and health risks associated with the depletion of the ozone layer. T o F

F

The troposphere contains 90% of the ozone in the atmosphere. T o F

F

Acid rain is a secondary pollutant. T o F

T

Halons contain halogens, which are highly reactive with oxygen. T o F

T

Ozone is both helpful and harmful to life on Earth. T o F

T