OZONE: The Hole Story Name ________________________ Video Worksheet Period ______ NB pg# ______ Part 1 Use the following terms to fill in the questions as you watch Part 1 of the video. All of the terms will not be used. 50’s children O2 yes 60’s chlorine O3 air conditioners filters out shoes adults hats UVA cataracts invisible UVB CFC’s no UVC 1. Ozone is ____invisible______ to the naked eye. 2. Ozone performs one very important function, it _______filters out___ dangerous ultraviolet rays of the sun and makes life possible on earth. 3. The decline of the ozone layer began in the _____50s___. 4. The tiny chemical package developed by Dupont in the 1930’s was called ______CFCs________. 5. The chemical formula for oxygen molecules is ____O2_____. The chemical formula for ozone molecules is _____O3______. 6. UV breaks apart CFC releasing a ______chlorine_____ atom which destroys ozone molecules. 7. Invisible CFCs have been escaping from the automobile ____air conditioners____ every time a car has been junked. 8. There are 3 types of UV radiation. __UVB_ is very biologically active. UV enters skin cells and damages the DNA code. 9. In New Zealand, children wear _____hats____ during recess. 10. ____Children_____ are most sensitive to UVB radiation. 11. ___Cataracts______ may occur from too much UV sunlight. 12. Does UV sunlight only affect animals? ___no_ Turn this paper over for questions on Part 2. Part 2 Use the following terms to fill in the questions as you watch Part 2 of the video. All of the terms will not be used. 50 hole oxygen 100 human South Pole chemical reactions no sulfur clean industrial Virginia coldest North Pole warmest Oregon yes 13. In 1975, the first state to prohibit the use of CFCs in aerosols was _____Oregon____. 14. In 1981, British scientists discovered an alarming loss of ozone over the ____South Pole_____. 15. The reason that the ozone depletion is so much greater in the Antarctic than it is in other places is that it really is the ___coldest____ place on Earth. 16. Clouds of ice crystals form and provide a surface where ____chemical reactions_____ break the bonds of a CFC molecule. 17. CFCs are the primary cause of the Antarctic ozone ____hole__ and CFCs are due to __human___ activity. 18. Have ozone losses occurred only in the Southern Hemisphere? ___no____ 19. ___Sulfur____ can perform the same role as ice crystals but it doesn’t need extreme cold. 20. Must countries around the equator be concerned about ozone depletion? ___yes____ 21. CFCs are used to ___clean___ electronic equipment, for cooling, and for suppressing fires. 22. A single molecule of CFC takes up to __50___ years to reach the ozone layer. 23. CFCs stay in the atmosphere for as long as ___100__ years. 24. __Industrial______ countries are the major polluters as far as CFCs go. Turn to the next page for questions on Part 3. Part 3 Use the following terms to fill in the questions as you watch Part 3 of the video. All of the terms will not be used. bad good orange juice brown healthy stable electric lemon juice unstable 25. There are two kinds of ozones. One at the stratospheric level which is ___good___ and tropospheric ozone or ground level ozone which is _____bad_____. 26. Plants grown in a filtered air greenhouse are ____healthy____. Smoggy air produces plants with ____brown__ edges and leaves. 27. Ozone produced at lower levels is not ____stable___ so it can’t be transported to higher levels in the atmosphere. 28. _____Electric_____ cars may help prevent air pollution. 29. What did Ray Turner use instead of the rosin flux? ___lemon juice____ 30. List 3 things you can wear to protect yourself from UV damage. _____wear hats, sunglasses, ____ _____suncreens__________.
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