ENVS 200 (63601 ENVIRONMENTAL HEALTH ISSUES FINAL EXAMINATION ay 28, 2016 Dr. Ch

Question

ENVS 200 (63601 ENVIRONMENTAL HEALTH ISSUES FINAL EXAMINATION ay 28, 2016 Dr. Charles B. Burrus Spring 2016 tudent Name: Answer each of the 25 exam questions. Select only one choice per multiple choice question (circle letter of your answers). Complete short answers in the space provided. The Bonus question is the optional and worth a maximum of 10 points. 1. Which of the following statements is not true about increasing concentrations of Co2 in the atmosphere? a. There an amount of CO: by the ocean. b. is an increase in damage and deaths of, coral reefs. c. There is a corresponding decrease in the amount ofos (ozone) in the troposphere. d. There is an increase in global warming. but a harmful air pollutant when in the 2. ozone is protective when in the a. Troposphere: Stratosphere b. Mesosphere: Troposphere c. Stratosphere: Troposphere d. Stratosphere: Mesosphere 3. In the production of photochemical smog (the on-NOx-HC connection), the presence of hydrocarbons such as Vocs will: a. Accelerate the oxidation of nitric oxide (NO) to nitrogen dioxide (NO2) b. Retard (slow) the oxidation of NO to NO2 c. Have no effect on the oxidation of NO to NO2 d. Eliminate the formation of ozone. 4. Because of the chemical reactions in this part of our atmosphere, chlorine essentially regenerates a form that is destructive to O, resulting in a type of positive feedbac loop. This has proven highly destructive to the Os layer, enabling a single chlorine atom to destroy: a. 1,000 o molecules b. 10,000 O, molecules c. 100,000 0, molecules d. 1,000,000 O3 molecules

Explanation / Answer

1) c

Co2 has no effect on ozone. Ozone depletion is mainly due to chlorofluorocarbons.

2) c

The ozone present in stratosphere is called good ozone as it protect us from harmful UV radiation.

And if it is present in troposphere it is called bad ozone and it has negative effects like damaging human health and vegetation

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