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Twenty Questions
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41	News Quiz #[removed]September 25, 2014 Quiz, Vocabulary, Headlines, and Links CHALLENGE QUESTION September twenty-third is the date of which equinox? QUIZ QUESTIONS 1. True or False? Add to Reading List Source URL: www.ket.org Language: English - Date: 2014-09-25 12:04:20 Kentucky Geography of the United States Louisville Water Company
42	TWENTY QUESTIONS Q12: Is there depletion of the Arctic ozone layer? Yes, significant depletion of the Arctic ozone layer now occurs in some years in the late winter/spring period (January-April). However, the maximum de Add to Reading List Source URL: www.esrl.noaa.gov Language: English - Date: 2006-01-21 00:21:55 Earth Atmosphere Oxygen Ozone layer Ozone Polar stratospheric cloud Dobson unit Stratosphere Atmosphere of Earth Ozone depletion Environment Atmospheric sciences
43	TWENTY QUESTIONS Q8: What are the reactive halogen gases that destroy stratospheric ozone? Emissions from human activities and natural processes are large sources of chlorine- and bromine-containing gases for the strato Add to Reading List Source URL: www.esrl.noaa.gov Language: English - Date: 2006-01-21 00:21:35 Atmosphere Chemical elements Halogens Ozone Chlorofluorocarbon Chlorine Bromine Atmosphere of Earth Dobson unit Chemistry Ozone depletion Oxidizing agents
44	TWENTY QUESTIONS: 2006 UPDATE Q16: Has the Montreal Protocol been successful in reducing ozone-depleting gases in the atmosphere? Yes, as a result of the Montreal Protocol, the total abundance of ozone-depleting gases i Add to Reading List Source URL: www.esrl.noaa.gov Language: English - Date: 2007-03-27 17:51:00 Ozone depletion Refrigerants Halogenated solvents Montreal Protocol Chlorofluorocarbon Ozone layer Bromotrifluoromethane 1 1 2-Trichloro-1 2 2-trifluoroethane Ozone Chemistry Halomethanes Greenhouse gases
45	TWENTY QUESTIONS Q13: How large is the depletion of the global ozone layer? The ozone layer has been depleted gradually since 1980 and now is about an average of 3% lower over the globe. The depletion, which exceeds the Add to Reading List Source URL: www.esrl.noaa.gov Language: English - Date: 2006-01-21 00:21:59 Atmospheric sciences Atmosphere Oxygen Ozone layer Ozone Stratosphere Antarctica Atmosphere of Earth Scientific Assessment of Ozone Depletion Earth Ozone depletion Environment
46	TWENTY-ONE QUESTIONS, AND ANSWERS, ABOUT RADIATION AND SUBSISTENCE HARVESTED BIRDS AND OTHER RESOURCES IN ALASKA Add to Reading List Source URL: epi.hss.state.ak.us Language: English - Date: 2011-10-13 16:16:00 Physics Radioactivity Nuclear accidents Nuclear safety Fission products Ionizing radiation Radioactive contamination Radiation therapy Radiation Nuclear physics Medicine Radiobiology
47	TWENTY QUESTIONS: 2006 UPDATE Q12: Is there depletion of the Arctic ozone layer? Yes, significant depletion of the Arctic ozone layer now occurs in some years in the late winter/early spring period (January-April). Howe Add to Reading List Source URL: www.esrl.noaa.gov Language: English - Date: 2007-03-27 17:48:12 Earth Atmosphere Oxygen Ozone layer Ozone Polar stratospheric cloud Stratosphere Atmosphere of Earth Arctic Ozone depletion Environment Atmospheric sciences
48	TWENTY QUESTIONS Q10: Why has an “ozone hole” appeared over Antarctica when ozone-depleting gases are present throughout the stratosphere? Ozone-depleting gases are present throughout the stratospheric ozone layer b Add to Reading List Source URL: www.esrl.noaa.gov Language: English - Date: 2006-01-21 00:21:46 Environment Atmosphere Oxygen Polar stratospheric cloud Ozone layer Ozone Stratosphere Antarctica Atmosphere of Earth Atmospheric sciences Ozone depletion Earth
49	TWENTY QUESTIONS I. OZONE IN OUR ATMOSPHERE Q1: What is ozone and where is it in the atmosphere? Ozone is a gas that is naturally present in our atmosphere. Each ozone molecule contains three atoms of oxygen and Add to Reading List Source URL: www.esrl.noaa.gov Language: English - Date: 2006-01-21 00:20:59 Environment Ozone depletion Atmosphere Oxidizing agents Environmental chemistry Ozone layer Ozone Stratosphere Atmosphere of Earth Chemistry Oxygen Earth
50	TWENTY QUESTIONS III. STRATOSPHERIC OZONE DEPLETION Q11: How severe is the depletion of the Antarctic ozone layer? Severe depletion of the Antarctic ozone layer was first observed in the early 1980s. Antarctic ozone dep Add to Reading List Source URL: www.esrl.noaa.gov Language: English - Date: 2006-01-21 00:21:51 Atmospheric sciences Oxygen Atmosphere Environmental chemistry Ozone layer Ozone Dobson unit Antarctica Stratosphere Ozone depletion Earth Environment

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