In the upper atmosphere, ozone forms a protective layer that shields us from the suns ultraviolet rays. Pdf depletion of the ozone layer and its consequences. Without the suns warmth, it would be too cold to live on earth, but the sun also gives off harmful ultraviolet rays, or uv rays for short. What is the procedure of ozone depletion layer answers. If you are looking for classroom materials related to the ozone hole consider the nearground level ozone pollution lab posted by noaa and. As project scientist for nasas aura satellite, duncan has seen how much humans are affecting earths atmosphere and the quality of the air we breathe. What is the issue with the hole in the ozone layer. There are also springtime polar tropospheric ozone depletion. Ozone is not solely formed in the earths atmosphere. You will also study the research and policy that has been. It is an essential factor for many global, biological and environmental phenomena.
The thinning is most pronounced in the polar regions, especially over antarctica. The loss in this region is commonly called the ozone hole because the ozone depletion is so large and localized. High uv levels can cause skin cancer, cataracts, as well as affecting the growth of plants. This layer absorbs 9799% of the suns high frequency ultraviolet light, which is potentially damaging to life on earth. The depletion of the ozone layer is a problem that occurs when there is a steady decline in the structure of the ozone layer. The ozone layer lies approximately 1540 kilometers 1025 miles above the earths surface, in the stratosphere. This this course is for individuals who are involved with. The process of ozone depletion pennsylvania state university. Is there a difference in ozone coverage between different hemispheres. The word ozone means smelly in greek because the gas has a strong odor. Analyzing the antarctic ozone hole college level brian welch. In an associated literacy activity, students learn how to tell a story in order to make a complex topic such as global warming or ozone holes easier for a reader to grasp.
This website addresses stratospheric ozone issues, including the science of ozone depletion, epas regulatory approach to protecting the ozone layer, epaapproved alternatives to ozonedepleting substances, and sun safety. Ozone depletion, gradual thinning of earth s ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. Many organizations perform research on the ozone layer ozone layerthe region of the stratosphere containing the bulk of atmospheric ozone. The latter phenomenon is referred to as the ozone hole.
The ozone layer is a layer in earths atmosphere which contains relatively high concentrations of ozone o3. It has been found that this protective ozone layer is getting depleted because of the presence of cfc chlorofluorocarbon compounds. Basic ozone layer science ozone layer protection us epa. The earths ozone layer ozone layerthe region of the stratosphere containing the bulk of atmospheric ozone. A dynamic equilibrium is maintained between the formation and decomposition of ozone. Several resources about ozone are available from the serc websites. Ozone layer depletion and its effects 1575 words 7 pages. Ozone layer, region of the upper atmosphere, between roughly 15 and 35 km 9 and 22 miles above earths surface, containing relatively high concentrations of ozone molecules. With continued declines in cfcs, experts project the ozone layer will recover to its 1980 conditions around 2070. One chlorine molecule from a cfc can destroy up to 100,000 ozone molecules. A hole in the ozone layer has developed over antarctica. This is a school project on the ozone layer made by my daughter aakanksha. The rest of the molecules are mostly nitrogen and oxygen, like the air we breathe.
Tropospheric ozone ozone pollution related site guides. The ozone layer lies approximately 1540 kilometers 1025 miles above the earths surface, in the. Mar 28, 2020 ozone depletion biology projects, biology science fair project ideas, biology topics for cbse school,icse biology experiments for kids and also for middle school, elementary school for class 5th grade,6th,7th,8th,9th 10th,11th, 12th grade and high school, msc and college students. Ozone is an irritating, corrosive, colorless gas with a smell something like burning electrical wiring. Our experts wont do the work for you, but they will make suggestions and offer guidance if you come to them with specific questions. Ozone gas is perceptibly blue in colour and has a characteristic pungent smell. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. The ozone layer environmental sciences fair project. Pdf ozone o 3 is a stratospheric layer that plays important role in providing support to humans for their. Ozone depletion, gradual thinning of earths ozone layer caused by the release of chemical compounds containing gaseous chlorine or.
The assessment may be reproduced or excerpted, without. The concentration of ozone in the ozone layer is usually under 10 parts ozone per million 5. There are three other graphics and the article is worth reading. Unfortunately, this gives them plenty of time to find their way to the ozone layer. Certain compounds such as chlorofluorocarbons, cfcs, are released into the atmosphere by human activities, and these cfcs particularly, they are very, very unreactive at the atmospherical ground level and they go all the way up to the stratosphere and then. Ian grimmond ozone layer depletion when you walk outside, there is a pale blue molecule up in the stratosphere that is protecting you every second of every day of your life, this molecule is called ozone. Located in the upper atmosphere, the ozone layer is a blanket of ozone gas, o3, which until recently completely enveloped the earth and its lower atmosphere. One of the main reasons for the widespread concern about depletion of the ozone layer is the anticipated increase in the amounts of ultraviolet. Mar 21, 2020 ozone depletion, gradual thinning of earth s ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. Aura, launched in 2004 as a key component of nasas earth observing system, studies earths ozone layer, air quality and climate. Ozone layer project1 ozone depletion chlorofluorocarbon. The ozone layer is a thin protective layer of gas 10 km50km above the earth, in the upper stratosphere. In lower atmosphere, atmospheric oxygen get dissociated and subsequently combines with molecular oxygen of the.
The paper ozone depletion and ozone hole is a wonderful example of an assignment on environmental studies. Ozone o 3 layer presents at stratosphere which is kilometers above the ground that. Depletion of this layer by ozone depleting substances ods will lead to higher uvb levels, which. In 10 million air molecules, only 3 are ozone, making it much less common than other molecules such as oxygen, which make up about 2 million of. Layers of the atmosphere 45the suns utraviolet rays 68the ozone layer 9 3. Ozone depletion facts and information national geographic. Ozone layer depletion is the thinning of ozone layer.
Ozone depletion and ozone hole example topics and free. The invisible shield is the ozone layer located in the stratosphere, which starts about 10 miles above the surface and contains about 90 percent of all the ozone molecules in the atmosphere. This calls for the formulation of approaches to cut down the effects of the ozone layer depletion. Pdf research has shown that high school and college students have a lack of conceptual. Ozone depletion biology projects, biology science fair project ideas, biology topics for cbse school,icse biology experiments for kids and also for middle school, elementary school for class 5th grade,6th,7th,8th,9th 10th,11th, 12th grade and high school, msc and college students. When cfc is released into the atmosphere, they mix with atmospheric.
Ozone is a molecule, with a strong smell and it is blue in color. Causes of ozone layer depletion and its effects on human. But through domestic and international action, the ozone layer is healing and should fully recover by about 2065. Find projects on which serc is a leader or collaborator. Research into ozone depletion has therefore focused largely,though not exclusively,on trends and processes within the stratosphere,the layer of stratified, relatively stable air that houses the ozone layer and.
Students will be able to differentiate between o2 oxygen and 03 ozone. In this picture we are seeing how the ozone layer is destroyed and the effects of that destruction. Depletion of the ozone layer is a thorny issue not only to environmentalists but to the world at large because of the devastating affects it has on the climate. The ozone layer contains less than 10 parts per million of ozone, while the average ozone concentration in earths. For this science project you will need to develop your own experimental procedure. Although this particular project focuses on locating the ozone layer, it helps to understand why the ozone layer exists where it does in the atmosphere. Oct 18, 2018 international ozonelayer assessments a noaa aeronomy lab site that contains information on the international assessments of ozone depletion. Causes and effects ozone depletion in our stratosphere the greenhouse effect and. Ozone national institute of environmental health services.
Pdf causes of ozone layer depletion and its effects on. If you would like to discuss your ideas or need help troubleshooting, use the ask an expert forum. This website addresses stratospheric ozone issues, including the science of ozone depletion, epas regulatory approach to protecting the ozone layer, epaapproved alternatives to ozone depleting substances, and sun safety. Project report on ozone depletion environmental pollution. In this lesson, you will learn the importance of the ozone layer and how it is depleted.
You can find maps of the ozone layer and compare different regions of the globe for ozone coverage. Another question that frequently arises is why an ozone layer exists. High level documents for scientists and policy makers. Depletion of this layer by ozone depleting substances ods will lead to higher uvb levels, which in turn will cause. Ozone o 3 is a stratospheric layer that plays important role in providing support to humans for their survival. Below is a list of project websites that provide visualizations, teaching activities, and tools that may be of use in the classroom or in lab. Approximately 90 percent of the atmospheres ozone occurs from 1018 km 611 miles to.
Anita salem, mathematics, rockhurst university dale harak, chemistry, rockhurst university. This success effort offers the world three lessons that we can learn from, he said in the message. The ozone layer is one of the layers in the earths atmosphere, contained mostly within in the stratospheres layer, at a distance of between 15 and 30 km from the surface of the earth. Approximately 90 percent of the atmospheres ozone occurs from 1018 km 611 miles to about 50 km about 30 miles above earths surface. Students will be able to describe where in the atmosphere the ozone layer is located. Anita salem, mathematics, rockhurst university dale harak, chemistry, rockhurst university with the assistance of sharon anthony, chemistry, evergreen state college bill barker, mathematics, bowdoin college sam butcher, chemistry, bowdoin college.
It can also be prepared and generated in the laboratory. Ozone layer research and technical resources us epa. Ozone present in the stratosphere forms a protective layer and known as ozone layer, ozonosphere or ozone umbrella its concentration in atmosphere is about 10 ppm. Cfc molecules are highly stable and can last for up to 100 years. The ozone layer or ozone shield is a region of earths stratosphere that absorbs most of the suns ultraviolet radiation. Pdf college students understanding of atmospheric ozone. Our discussion here will focus on two of the main reactions involved in the production of ozone in the atmosphere. It contains high concentration of ozone o 3 in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere. The troposphere extends from the surface of the earth upto 12 km and stratosphere extends upto about 50 km from the surface of the earth. Oct 31, 2019 with continued declines in cfcs, experts project the ozone layer will recover to its 1980 conditions around 2070. International ozonelayer assessments a noaa aeronomy lab site that contains information on the international assessments of ozone depletion. There isnt much of it, but ozone is powerful, able to block the most. This page replaces the former stratospheric ozone and human health project sedac web site which had included the following.
Ozone ozone is a simple molecule of three oxygen atoms and it is present in the two lowest layers of the atmosphere troposphere and stratosphere. Ozone depletion biology science fair project ideas. Thus, it is important for society t o recognize that the thinning ozone layer is a problem and to take action in order to ensure the safety and survival of future generations. At ground level, ozone is a harmful air pollutant and a primary constituent of urban smog. The ozone layer, in the stratosphere, is where about 90% of the ozone in the earth system is found. Some ozone also exists in the troposphere, when industrial pollutants react in the presence of sunlight. Ozone layer introduction the ozone layer refers to the ozone within stratosphere, where over 90% of the earths ozone resides. In the upper atmosphere, atmospheric gases absorbs the suns radiation, get ionized, and release molecules. See more ideas about ozone layer, ozone depletion and layers. Use the information in the summary tab as a starting place. Les diablerets, switzerland by jeanpierre pommereau, june 2010. Students explore the causes and effects of the earths ozone holes through discussion and an interactive simulation. Asked in ozone layer what causes depletion in the ozone layer.
Free printable college english experiments human body project ideas math interactive. Ozone depletion consists of two related events observed since the late 1970s. Success in protecting ozone layer offers lessons for. The ozone layer helps to protect life from harmful ultraviolet radiation. Reddy, principal sri venkateswara college university. Mike clark, carleton college students explore observational data from ozone sondes, toms, and uars measurements to learn about changes in stratospheric ozone over the past several decades. The ozone layer is important for blocking most of the harmful radiation that comes from the sun. This legally binding instrument has yielded positive results as many scientific studies have shown the thinning of the ozone layer is gradually being reduced, he wrote. The views of forty primary students about ozone and its depletion were recorded through individual, semistructured interviews. Environmental sciences fair project the ozone layer projects by grade level. Oct 31, 2018 the ozone layer, the damage being caused to it by humanity, the long term effects of that and what can be done to prevent further impact on the ozone.