Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
2 Cards in this Set
- Front
- Back
|
Ozone
|
1) Ozone is an unusual form of oxygen.
2) formed naturally 3) forms around earth's equator where sun's rays are most intense 4) wind carries ozone to other parts of the world 5) in our region, ozone will build up during winter months when sun's ultraviolet (UV) rays are less intense and will diminish during summer months when rays are more intense 6) absorbs 99 % of sun's ultraviolet (UV) rays which have been linked to skin cancer, certain eye diseases, and premature aging of the skin. |
|
|
CFC's (chlorofluorocarbons)
|
1) a group of man-made chemicals invented over 100 years ago
2) especially useful as refrigeration gases (freon) 3) used in aerosol sprays, manufacturing of plastics, and in certain cleaning solvents 4) They DESTROY ozone 5) reduced ozone levels have led to a rise in skin cancer over the years 6) this problem discovered in 1973 7) use of CFC's has been decreased 8) as we use less CFC's, the ozone molecules can rebuild gradually 9) CFC's must be eliminated to allow ozone to rebuild to normal level 10) wear sunscreen to shield yourself from damage from UV rays |
