The first manmade threat to the ozone layer was noted by harold johnston 1971. Naturally occurring chlorine has the same effect in the ozone layer, but has a shorter life span. Students explore the dynamic and competing upper atmospheric roles of the protective ozone layer, the suns uv radiation and harmful humanmade cfcs chlorofluorocarbons. The result is a steady depletion of our protective layer of ozone. Twenty questions and answers about the ozone layer noaaesrl. Ultraviolet radiation from the sun and depletion of the stratospheric ozone layer how oxygen, o 2, and ozone, o 3, intercept uv radiation from the sun short wavelength uv is absorbed by oxygen in the stratosphere. This worksheet has earth science regents questions about the ozone layer and ozone depletion. Courtney mayers ozone depletion vs global warming worksheet. In this science worksheet, learners find the answers to the five questions and they fill in the graphic organizer for the temperatures. The ozone layer lies approximately 1540 kilometers 1025 miles above the earths surface, in the stratosphere.
One example of ozone depletion is the annual ozone hole over antarctica exit that has occurred during the antarctic spring since the early 1980s. When highenergy ultraviolet rays uvc strike an oxygen molecule o. Twenty questions and answers about the ozone layer in the 2002 assessment, the international scientific community included this section to answer several of the general questions that are most frequently asked by students, the general public, and leaders in industry and government. Twenty questions and answers about the ozone layer. Rashid kamal ansari, jawaid iqbal and arif hussian. The 2002 wmounep assessment, scientific assessment of ozone depletion. National aeronautics and the ozone hole space administratio n. Explore the causes of ozone depletion and the effect on plankton, algae, plants, amphibians, and humans. The aim of this pack is to raise pupils awareness and understanding of ozone depletion in an interesting fashion. Chemistry of the ozone layer there are natural processes that create and destroy ozone in the stratosphere. Most questions and answers are updates of those presented in previous. To help maintain a broad understanding of the relationship between ozone depletion, odss, and the montreal protocol, this component of the scientific assessment of ozone depletion. Ozone depletion is not limited to the area over the south pole. Besides carbon dioxide, other greenhouse gases are methane, water vapour, nitrous oxide, cfcs and ozone.
It has been cold in the stratosphere in the last few years, so there has been particularly bad ozone depletion. This was also the start of intensive research into the chemistry of the atmosphere. In this chemistry worksheet, students determine the mass of the gas when filling a bicycle tire with nitrogen. Learn chemistry ozone with free interactive flashcards. Frequently asked questions about the ozone layer ozone. Use dissect mode to remove the layers of the earths atmosphere until you reach the ozone layer. May 21, 2014 resources for teaching about stratospheric ozone formation and depletion and the ozone holes. Measurements in the laboratory and in the atmosphere characterized the chemical reactions that were involved in ozone destruction. Answer environmental chemistry is the study of chemical and biochemical processes occurring in nature. Name the three main chemicals that cause the depletion of. This extreme stability allows cfcs to slowly make their way into the stratosphere most molecules decompose before they can cross into the stratosphere from the troposphere. The oxygen atoms may recombine to form o 2 or they may react.
Depletion of this layer by ozone depleting substances ods will lead to higher uvb levels, which in turn will cause increased skin cancers and cataracts and potential damage. Ozone depletion over india with so much worry about the rapid ozone depletion taking place in various parts of the earth, indian scientists are closely monitoring the ozone layer over india for possible depletion trends. Chlorofluorocarbons and ozone depletion american chemical. This quizworksheet combo will help you test your understanding of the importance of the ozone. Mar 26, 2020 in this lesson, students will develop an explanation for the consequences of ozone depletion on earth by planning and carrying out an investigation. Ozone in the stratospherea layer of the atmosphere between 15 and 50 kilometers 10 and. Ozone depletion overpopulation green construction bisphenol a carbon footprint waste management. Basic ozone layer science ozone layer protection us epa. Class xi chapter 14 environmental chemistry chemistry question 14.
Computer models of the atmo sphere employing this information. Which atmospheric layer contains most of the atmospheric ozone. This extreme stability allows cfcs to slowly make their way into the stratosphere most molecules decompose before they can. Create marketing content that resonates with prezi video. Students will use analysis and interpretation of data to develop a model to explain the cause and effect of ozone depletion on the planet earth. On a separate sheet of paper draw the earths surface and its atmosphere as concentric. In response to public concern about ozone depletion to study the chemistry and. In this lesson, students will develop an explanation for the consequences of ozone depletion on earth by planning and carrying out an investigation. Learn ozone depletion biology with free interactive flashcards. Introduction to atmospheric chemistry princeton university press, 1999. These processes regulate a balance of ozone and form the ozone layer. They are arranged following the different chapters of the book. Ks23 2 this activity pack has been designed for teachers, and is intended for use by top juniors aged 9 years taking key stages 2 or 3 of the national curriculum. Chemistry of ozone depletion cfc molecules are made up of chlorine, fluorine and carbon atoms and are extremely stable.
Quiz 1 answers covalent bonding, lewis structures, formal charges notes. The uars video 17 minutes is an excellent introduction to this lab. Ozone in the troposphere is toxic due to its reactive oxidizing capabilities. Importance of the ozone layer, effects of ultraviolet light on humans, location of ozone in atmosphere, graphing ozone concentra. One example of ozone depletion is the annual ozone hole over antarctica that has occurred during the antarctic spring since the early 1980s. Ozone, a gaseous molecule of three oxygens, surrounds the earth in what is known as the ozone layer. In recent years i have added course segments on aerosol chemistry and on mercury. Chlorofluorocarbons and ozone depletion answer guide.
Causes of ozone layer depletion and its effects on human. Here you can find all the resources for the ib chem hl classes. To be able to explain how the ozone layer protects the earth from harmful ultraviolet uv radiation and explain how ozone depletion takes place. For their work, rowland and molina shared the 1995 nobel prize in chemistry with another atmospheric chemist, paul j. Resources originally developed by the climate change schools project. This timeline highlights the average area of the ozone hole between september 7th and october th as observed by nasa spacedbased instruments see colored bars and scale. Due to its environmental significance, the chemistry of atmospheric ozone and ozone depletion has been a subject of much research and discussion. Using gumdrops and toothpicks, students conduct a largegroup, interactive ozone depletion model. Pdf causes of ozone layer depletion and its effects on. Use the quiz and worksheet to see what you know about the ozone layer. Using the color by number worksheet, ask students to create a. Scientists first became aware of the depletion of the ozone layer in 1985, when british researchers in antarctica were measuring the amount of ozone in the skies above.
Unit 10 atmospheric science, air pollution and climate change. Explain atmospheric ozone depletion and identify steps take to address it. Resources for teaching about stratospheric ozone formation and depletion and the ozone holes. Adapted for the internet from chlorofluorocarbons and ozone depletion, produced by the american chemical societys national historic chemical landmarks program in 2017. Sep 30, 2019 chemistry of ozone depletion cfc molecules are made up of chlorine, fluorine and carbon atoms and are extremely stable. In fact, the 1995 nobel prize in chemistry was awarded to three scientists who revealed the role of manmade chemicals, chlorofluorocarbons, or cfcs, in the ozone depletion process. The earths ozone layer ozone layerthe region of the stratosphere containing the bulk of atmospheric ozone. This bad ozone forms when sunlight initiates chemical reac tions in the air. Inclass worksheet further discussiondescription of aqi monitoring newspaper presentation by dr. Using the color by number worksheet, ask students to create a visual representation that accu. Ozone depletion gets worse when the stratosphere is very cold. These radiations can cause severe diseases in humans such as skin cancer, eye damage and genetic mutations etc 9.
Environmental chemistry 401 carbon dioxide crosses the delicate proportion of 0. In this ozone instructional activity, students fill in the blanks to sentences while following a powerpoint presentation on the ozone layer, its depletion, the causes of the depletion and its structure. I have included problems to support these course segments. The global exchange between ozone and oxygen is on the order of 300 million tons per day. P rimary air pollutants effect of primary pollutants reduction of primary pollutants acid rain human impact on the environment acid rain, global warming and ozone depletion. For webquest or practice, print a copy of this quiz at the earth science. Some facts on the quiz address where this layer can be found and what it is made of. They found that ozone levels seemed lower in september, october, and november than at other times of the year. Have you ever heard that radiation from the sun can be damaging for your body. Jan 06, 2014 environmental chemistry exercise with solutions 1. Ozone in the stratospherea layer of the atmosphere between 15 and 50 kilometers 10. Effects of ozone depletion ozone depletion is affecting the human health and environment negatively, as it allows the penetration of uv radiations to reach the earth. Halogen catalysis of ozone degredation halogens are a chemical family containing fluorine, chlorine, bromine and iodine.
Ozone depletion describes two distinct but related phenomena observed since the late 1970s. This is not really a hole through the ozone layer, but rather a large area of the stratosphere with extremely low amounts of ozone. Fortunately, earth has a special filter that protects us from many of the harmful rays that come from the sunthe ozone layer. All the questions on this quiz are based on information that can be found at earth science.
Atmospheric chemistry, chemical reactions, and history. Choose from 371 different sets of chemistry ozone flashcards on quizlet. In this ozone worksheet, students read about the ozone layer, its makeup and its depletion. Carbon dioxide is the major contributor to global warming. They answer three critical thinking questions about ozone and the ozone layer. Unit 10 atmospheric science, air pollution and climate. Ozone in the stratosphere is necessary to life as we know it because it absorbs energetic uv radiation. Chemistry equations for ozone depletion the student room. Choose from 500 different sets of ozone depletion biology flashcards on quizlet. Key to understanding the chlorine chemistry in the polar stratosphere is the. Ask students to provide evidence for their answers.
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