1 / 16

ALL ABOUT OZONE

ALL ABOUT OZONE. TROPOSPHERE. A layer of the atmosphere that is closest to the Earth’s surface Almost all weather occurs here Temperature decreases as altitude increases. STRATOSPHERE. Layer above the troposphere Extends from 18-50 km Almost all ozone is found in this layer.

keelia
Download Presentation

ALL ABOUT OZONE

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. ALL ABOUT OZONE

  2. TROPOSPHERE • A layer of the atmosphere that is closest to the Earth’s surface • Almost all weather occurs here • Temperature decreases as altitude increases

  3. STRATOSPHERE • Layer above the troposphere • Extends from 18-50 km • Almost all ozone is found in this layer

  4. WHAT IS OZONE? • Ozone is made of three oxygen atoms (O3) • Ozone absorbs UV radiation, and reduces the amount that reaches the earth

  5. The oxygen we find in our atmosphere is made up of two oxygen atoms (O2) • Because of its chemical formulation, a single atom of oxygen (O) is unstable • O3 is less stable than O2, because it wants to return to the diatomic state by giving up an oxygen atom

  6. Ozone has the same chemical structure whether it is found in the stratosphere or the troposphere. Where we find ozone in the atmosphere determines whether we consider it to be Dr. Jekyll or Mr. Hyde.

  7. In the troposphere, the ground-level or "bad" ozone is an air pollutant that damages human health, vegetation, and many common materials. It is a key ingredient of urban smog.

  8. In the stratosphere, we find the "good" ozone that protects life on earth from the harmful effects of the sun's ultraviolet rays.

  9. CHLOROFLUROCARBONS • Human-made chemicals • For many years, people thought CFC’s were miracle chemicals… • They are nonpoisonous, nonflammable, and do not corrode metals. • Used as coolants, to make plastic foams, and as a propellant in spray cans in everyday items (hairspray, deodorant, paint)

  10. They are stable at the Earth’s surface… BUT • CFC molecules break apart high in the stratosphere, and the molecules, specifically Chlorine, break apart (or eat away) the protective ozone layer

More Related