OZONE

What is the Ozone

The Ozone Layer | National Geographic Education Video

Colorless gas O3: Three oxygen atoms

The 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

Cause rubber to crack

Harmful to plants Damages lung

tissues Consider pollution

Absorbs harmful ultraviolet radiation from the sun UV-B Protects living

organisms

Lower Upper

http://ozonewatch.gsfc.nasa.gov/, April 6, 2011

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/environment-news/antarctica-ozone-vin.htmlhttp://ozonewatch.gsfc.nasa.gov/, April 6, 2011http://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