Unit Review

Question 1 of 15

Based on the environmental and soybean production data in this table, which factor appears to best explain the decreased crop yield in Region 1?

A. Increased levels of ozone

B. Reduced rainfall

C. Poor mineral levels in the soil of Region 1

D. Increased rainfall

Question 2 of 15

Which statement is best supported by these measurements of ozone pollutant levels at two different locations in a metropolitan area?

A. Lower fuel efficiency and northerly winds in the winter increase ozone pollution.

B. Northwest winds in the spring transport ozone pollution into the metropolitan area.

C. High summer temperatures and southerly winds contribute to high levels of ozone.

D. Heavy use of automobiles changes ozone levels the most.

Question 3 of 15

Which statement is best supported by this graph of ozone levels over a 24-hour period?

A. Ozone levels vary from day to day.

B. Ozone levels are higher during daylight hours.

C. Ozone concentrations vary inversely with temperature.

D. Diurnal ozone levels are random.

Question 4 of 15

Which of the following is an important precursor of ozone?

A. Ultraviolet light

B. Nitrogen oxides

C. Carbon dioxide

D. Oxygen

Question 5 of 15

According to this graph, when are ozone levels highest in the San Bernardino mountains?

A. Winter evenings

B. Spring mornings

C. Summer afternoons

D. Fall nights

Question 6 of 15

Which of the following statements is true of ozone?

A. Its concentration in the atmosphere fluctuates

B. It is produced as a result of photochemical reactions

C. It may be beneficial or harmful, depending on where it is in the atmosphere

D. All of the above

Question 7 of 15

Stratospheric ozone __________________.

A. Needs to be reduced

B. Protects us from the harmful wavelengths of sunlight

C. Causes skin cancer

D. Produces acid rain

Question 8 of 15

Tropospheric ozone _________________.

A. Is emitted as a gas from industrial smokestacks and vehicles' tailpipes

B. Is a minor constituent of smog

C. Is formed as a result of a photochemical reaction

D. All of the above

Question 9 of 15

The ozone in the upper levels of the earth's atmosphere screens out ___.

A. Cosmic dust particles

B. Meteors

C. Ultraviolet (UV) radiation

D. Smog

Question 10 of 15

Holes in the earth's ozone layer are caused by __________________.

A. Global warming

B. Chlorofluorocarbons

C. UV radiation

D. Automobile exhaust

Question 11 of 15

A temperature inversion would affect air pollution in a city by ____________.

A. Trapping pollutants close to the ground and increasing their concentration

B. Allowing pollutants to escape into the atmosphere and decreasing their concentration at ground level

C. Preventing ozone from forming, thereby reducing air pollution

D. Causing pollutant gases to expand, thereby diluting them and decreasing air pollution

Question 12 of 15

According to these charts, what is the leading cause of ozone detected in air-quality "nonattainment" areas?

A. Vehicles

B. Homes and businesses

C. Factories

D. Power plants

Question 13 of 15

Under federal law, ozone concentrations of ___ parts per million and higher in the air are unhealthful.

A. 0.12

B. 0.08

C. 0.03

D. None of the above; ozone in any amount is unhealthful.

Question 14 of 15

How many oxygen atoms are needed to make an ozone molecule?

A. 5

B. 4

C. 3

D. 2

Question 15 of 15

According to this map, on February 2, 2006, the Air Quality Index for Texas was ________________.

A. Moderate

B. Severe

C. Good

D. Unhealthful for sensitive groups