1) Hole in the ozone layer over the Antarctic has begun to shrink with scientists finding out that the hole has shrunk by ____ million square miles or 4 million square kilometres since 2000
a. 1.4
b. 1.5
c. 1.6
d. 1.7
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Answer
Explanation
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ANSWER: 1.5
Explanation:
Hole in the ozone layer over the Antarctic has started to shrink indicating good news for the environment several decades after the global accord was in place to phase out pollutants. - September ozone hole shrunk by 1.5 million square miles or 4 million square kilometres since 2000, this equals the area about the size of India.
- The ozone hole was first discovered in the 1950s
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2) When was International Day for the Preservation of the Ozone layer was celebrated?
a. 15 September
b. 16 September
c. 17 September
d. 5 June
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Answer
Explanation
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ANSWER: 16 September
Explanation:
The year 2015 also marks the 30th anniversary of Vienna Convention for Protection of the Ozone Layer. The Montreal Protocol on Substances that Deplete the Ozone Layer was signed on September 16, 1987 and since then, this day us celebrated as the international dat for preservation of the ozone layer. The theme for this year's International Day for the Preservation of the Ozone layer was 30 Years of Healing the Ozone Together. The 2015 slogan was Ozone: All There is Between You and UV.
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3) When was the 2015 International Day for the Preservation of the Ozone layer celebrated by the UN?
a. September 15
b. September 16
c. September 17
d. September 18
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Answer
Explanation
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ANSWER: September 16
Explanation:
21st International Day for the Preservation of the Ozone layer was celebrated across the world on September 16, 2015. The theme for this year was 30 Years of Healing the Ozone Together. The 2015 slogan was Ozone: All There is Between You and UV. The year 2015 also marks the 30th anniversary of Vienna Convention for Protection of the Ozone Layer. The Vienna Convention was signed on March 22 1985. The Montreal Protocol on Substances that Deplete the Ozone Layer was signed on September 16, 1987 and since then, this day us celebrated as the international dat for preservation of the ozone layer.
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4) Which of the following are sources of pollutants that adversely affect the ozone layer?
1) Bromine
2) Carbon tetrachloride
3) Nitric Oxide
4) Methyl chloroform
5) Chlorofluorocarbons
a. Only 1, 2 and 5
b. Only 1, 2, 3 and 5
c. Only 1, 3, 4 and 5
d. All of the above
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Answer
Explanation
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ANSWER: All of the above
Explanation:
Other sources – Hydrochlorofluorocarbons, chlorine, halons, hydrobromofluorocarbons and methyl bromide.
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