This is the most fantastic presentation of ozone you will ever see. It's life-changing.

1. Meg Bobo

2. What Is Ozone?
 The formula for ozone is O3
 Ozone gas is “an allotrope, or form, of the element
oxygen” (McGrath 1).
 Ozone is typically located in the stratosphere but can
also be found in the troposphere (Tran et al. 1;
Kimbrough 8).
 Ozone in the stratosphere protects life on Earth from
most harmful UV-B radiation and all destructive UV-C
radiation (McGrath 3).
 Ozone in the troposphere can cause a variety of health
problems (Kimbrough 8).

3. What Is the Chapman Cycle?
 The Chapman Cycle is the process by which ozone is
naturally formed and destroyed in the ozone layer
(Tran et al. 2).
 The Chapman Cycle is able to absorb UV radiation
because the reactions which make it up are exothermic
(McGrath 2).
 The Chapman Cycle consists of three primary
reactions: an oxygen molecule splits apart, an oxygen
atom combines with an oxygen molecule, and an
ozone molecule splits apart (Kimbrough 7).

4. What Is the Chapman Cycle?
 Step one:
 O22O (Kimbrough 7)
 Step two:
 O+O2O3 (McGrath 2)
 Step three:
 O3O2+O (Kimbrough 7)

5. How Is Ozone Formed in the
Troposphere?
 Step one:
 2O2+N22NO2 (Kimbrough 8)
 Step two:
 NO2NO+O (Kimbrough 8)
 Step three:
 O+O2O3 (Kimbrough 8)

6. What Is Ozone Depletion?
 When CFCs are released into the atmosphere, they
gradually float up into the stratosphere (McGrath 3).
 Then, the CFCs are broken apart by sunlight into
individual chlorine, fluorine, and carbon atoms
(McGrath 3). This reaction is a decomposition
reaction.
 Finally, chlorine steals an oxygen atom from an ozone
molecule, creating chlorine monoxide and an oxygen
molecule (McGrath 3). This reaction is a single
replacement reaction.
 Cl+O3ClO+O2

7. Why Should You Care About
Ozone?
 Ozone in the stratosphere absorbs harmful UV
radiation (Kimbrough 8).
 Ozone depletion in the stratosphere could be
catastrophic for the earth’s ecosystems: skin cancer,
cataracts, snow blindness, and reduced immunity in
humans, reduced photosynthesis in plants and
plankton, and developmental problems in fish
(Kimbrough 9).
 On the other hand, an increase in ozone in the
troposphere could lead to serious lung problems
(Kimbrough 9).

8. Works Cited
 Kimbrough, Doris R. "Ozone--Molecule with a Split Personality."
ChemMatters Sept. 2001: 7-9. ACS. Web. 6 Apr. 2014.
<http://www.acs.org/content/dam/acsorg/education/resources/
highschool/chemmatters/chemmatters-september-2001.pdf>.
 McGrath, Jane. "How the Ozone Layer Works" 29 April 2008.
HowStuffWorks.com.
<http://science.howstuffworks.com/environmental/green-
science/ozone-layer.htm> 06 April 2014.
 Tran, Caroline, et al. "Depletion of the Ozone Layer." UC Davis
ChemWiki. U of California Davis, n.d. Web. 6 Apr. 2014.
<http://chemwiki.ucdavis.edu/Physical_Chemistry/Kinetics/Cas
e_Studies%3A_Kinetics/Depletion_of_the_Ozone_Layer>.