2. 7 th Grade 11/9 Do Now: What is the ozone layer?

3. The Ozone Layer above your head, lies an atmospheric layer called the ozone layer. Within the stratosphere, about 19 km to 48 km 1 1 Earth’s Atmosphere Ozone is made of three atoms of oxygen.

4. The Ozone Layer Ozone absorbs most of the ultraviolet radiation that enters the atmosphere. 1 1 Earth’s Atmosphere Ultraviolet radiation is one of the many types of energy that come to Earth from the Sun.

5. CFCs 1 1 Earth’s Atmosphere chlorofluorocarbons (CFCs), chemical compounds used in some refrigerators, air conditioners, and aerosol sprays, and in the production of some foam packaging that can destroy the ozone layer

7. Ozone Hole Seasonal hole in ozone layer over Antarctica which has changed due to CFCs

8. UV Beads Lab Unravel paper clip String 5 beads on paperclip Place another 5 beads on another paperclip. Put sunscreeen on the outside of this baggie. Some of the groups will stand in the sun. Some groups will stand in the shade.

9. UV Beads Lab Results: What happened to the beads? With sunscreen? In the shade? Reaction: What have you learned? Why do you think its important to wear sunscreen? Why do you think doctors say to wear sunscreen at the beach even if you stay under an umbrella?