OZONE
What is the Ozone
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
The Ozone Layer | National Geographic Education
Video
Colorless gas
O3: Three oxygen atoms
 The
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oxygen we breath only has two oxygen atoms ( O2)
Located in the stratosphere
Is a greenhouse gas and does help govern Earth’s
climate
Ozone Questions

How is a molecule of ozone different from a
molecule of atmospheric oxygen?
 A.
Atmospheric oxygen has one more oxygen atom
than ozone
 B. Atmospheric oxygen has one less oxygen atom than
ozone.
 C. Oxygen and ozone are the same; they are found at
different layers of the atmosphere
 D. Oxygen is produced by plants; ozone is produced
when oxygen combines with CO2
Ozone affects in the lower and upper
atmosphere
Lower
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

Cause rubber to crack
Harmful to plants
Damages lung tissues
Consider pollution
Upper

http://ozonewatch.gsfc.nasa.gov/, April 6, 2011
Absorbs harmful
ultraviolet radiation
from the sun
 UV-B
 Protects
living
organisms
Ozone Questions

Where is ozone considered a pollutant?
 A.
in the upper atmosphere where it blocks the suns
rays
 B. in the mid-atmosphere where it prevents cloud
formation.
 C. in the lower atmosphere where it impairs normal
lung function.
 D. it is a pollutant everywhere it is found.
Ozone Question

What does the ozone layer protect living things
from?
 A.
bad weather
 B. ultraviolet rays
 C. excessive heat
 D. meteors and meteorites
Ozone Depletion
Ozone Hole

Greatest effects are seen at Earth’s poles


Antarctic: ozone hole forms from September to November
Artic: ozone hole forms from March to May



Not as bad as Antarctic ozone hole because the Artic doesn’t experience
as cold of temperatures as Antarctic.
“The largest ozone hole ever observed occurred on 24 September
2006.”
Chemical reactions involving chlorine, bromine, nitrogen, and
hydrogen break down the ozone layer. Also CFCs
(chlorofluorocarbons) have contributed to the break down.

In the winter time at each pole the chlorine and bromine will gather
together, because of the lower temperatures and less sunlight. Then
in the spring and summer months the sunlight will increase and start
the change reaction of the Cl and Br breaking down the ozone layer
creating a hole.
Teachers' Domain: Ozone Hole
 http://video.nationalgeographic.com/video/player/news/envir
onment-news/antarctica-ozone-vin.html
http://ozonewatch.gsfc.nasa.gov/, April 6, 2011

http://www.ozonelayer.noaa.gov/science/ozhole.htm, April 7, 2011
Ozone Questions

What health issue associated with the ozone hole?
 A.
difficult breathing
 B. fever
 C. skin cancer
 D. nagging cough
Ozone Question

Life on land did not develop on Earth in abundance
until the sun’s radiation was reduced. When did this
happen?
 A.
when human beings built machines that burn fossil
fuels.
 B. when ozone had been absorbed out of the upper
atmosphere
 C. when plants had an opportunity to live with animals
 D. when enough ozone had built up in the upper
atmosphere