Displaying all worksheets related to ozone layer class 5. Air pressure decreases with height in the atmosphere. The word ozone means smelly in greek because the gas has a strong odor. The ozone hole is defined geographically as the area where in the total. These individual atoms then join up with o 2 molecules and make o 3, or ozone. One chlorine molecule from a cfc can destroy up to 100,000 ozone molecules. Causes of ozone layer depletion and its effects on human. Policylegislation on fgases and alternatives two environmental frameworks one goal the montreal protocol and the kyoto protocol. This study was conducted at university of gujrat during 20142015 as a term paper for master of philosophy. Latitude strongly influences climate because solar energy falls on areas that are closer to the equator than to the poles. Childrens models of the ozone layer and ozone depletion article pdf available in research in science education 264. Find out what caused the ozone hole, and how the 1989 montreal. Find, read and cite all the research you need on researchgate. Ozone is harmful at ground level but high up the atmosphere ozone layer plays a vital role in the protection of all living beings.
Indias integrated approach to protect the ozone layer introduction one of the most important environmental concerns the world faces today is of depletion of the ozone layer in the stratosphere. The ozone layer is composed of ozone, a molecule made up of three oxygen atoms bonded together. Ozone is an irritating, corrosive, colorless gas with a smell something like burning electrical wiring. The ozone layer is a layer in earths atmosphere which contains relatively high concentrations of ozone o3. As a result of its chemical composition, ozone is regarded as a special type of oxygen as it contains three oxygen molecules o3 as opposed to the usual two oxygen molecules o2. Ozone depletion theory, on the other hand, gives a very direct explanation for why temperatures did not change much from 1998 through 20 when ozone depletion was not increasing and then began to rise rapidly again in 2014 and for why ocean heat content continues to rise, because the ozone layer remains depleted. Mar 31, 2020 on wednesday, a research paper released in science daily showed that the ozone layer has started recovery due to changing wind patterns. And also it means that when you see a bullet, flying to you,then it is already late to run away. Ozone depletion definition ozone depletion is the term commonly used to describe the thinning of the ozone layer in the stratosphere. The ozone layer contains less than 10 parts per million of ozone, while the average ozone concentration in.
On wednesday, a research paper released in science daily showed that the ozone layer has started recovery due to changing wind patterns. Click download or read online button to get acid rain and ozone layer depletion book now. Principally, an ozone molecule is nothing but an oxygen molecule that has received an extra oxygen atom by electric high voltage. The ozone layer is found in the stratosphere, which is the layer of the atmosphere immediately above the troposphere. Ozone depletion and climate change the climate system involves the atmosphere specifically processes within the troposphere, such as air circulation patterns land surfaces and oceans. Protecting the ozone layer department of the environment. Temperatures in the troposphere decrease with altitude. But, it is very important that the world comply with the montreal protocol. Ozone is formed when the sunlight hits oxygen molecules o 2 and breaks them up into individual atoms. However, because ozone absorbs solar radiation and is a greenhouse gas, ozone changes and climate change are. The hole is one of the meaning which we still will have to understand. It forms a protective layer that absorbs harmful ultraviolet light from the sun. Ozone layer damage is more like a really thin patch than a hole. The ozone layer is a deep blanket in the stratosphere made up of comparatively high concentration of the ozone.
Mar 21, 2020 ozone depletion, gradual thinning of earths ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. As you read the lesson, place the terms in the correct location in the concept maps. Ozone depletion consists of two related events observed since the late 1970s. The tropospheres ozone layer protects organisms from the suns harmful rays. At ground level, ozone is a pollutant, but at higher altitudes it benefits life. Unfortunately, this gives them plenty of time to find their way to the ozone layer.
Ozone layer and the formation of the ozone hole aa. Concept map a concept map can help you organize information and show you how ideas are connected. The ozone layer is expected to return to normal levels by about 2050. Most ozone resides in the stratospheric ozone layer and a small percentage. It contains high concentrations of ozone o3 relative to other parts of the atmosphere. Antara banerjee and her colleagues at the university of colorado boulder did the research and noted that the ozone layer in the northern hemisphere is on track to fully recover to its 1980s levels sometime in the 2030s. However, the ozone layer is destroyed by manmade chemicals known as ozonedepleting substances ods. Ozone depletion potential an overview sciencedirect topics. On each line, write the term from the word bank that correctly completes each sentence.
Pdf childrens models of the ozone layer and ozone depletion. Ozone is a colorless gas mainly found in earths stratosphere. The concept of ozone forming potential and its quantification in any given airshed, it is common to find hundreds of different voc species, each with its own unique chemistry. Life on earth has been protected for thousands of years with a vital layer of poison in the atmosphere. Natural refrigerants sustainable ozone and climatefriendly alternatives to hcfcs introduction dr. Ozone layer introduction the ozone layer refers to the ozone within stratosphere, where over 90% of the earths ozone resides. Worksheets are activity pack for key stages 2 3, national aeronautics and the ozone hole space administratio n, name date class, note in the information box at the bottom of the screen, airnow teacher toolkit for teachers, chapter 15 reinforcement work earths amazing atmosphere, atmosphere, cross curricular. National aeronautics and the ozone hole space administratio n. Ozone layer is also naturally broken down but there is a balance between its formation and natural depletion. The ozone layer is not really a layer at all, but has become known as such because most ozone particles are scattered between 19 and 30 kilometers 12 to 30 miles up in the earths atmosphere, in a region called the stratosphere. Ozone layer definition of ozone layer by merriamwebster.
Acid rain and ozone layer depletion download ebook pdf. It covers the entire planet and protects life on earth by absorbing harmful ultravioletb uvb radiation from the sun. Ozone in the stratospherea layer of the atmosphere between 15 and 50. The carbon in fossil fuels was in the atmosphere long ago. The thermosphere is the atmospheric layer farthest.
By the usual definition, stratospheric ozone depletion is not an integral part. Destruction of the upper atmospheric layer of ozone gas, caused by substances formed from breakdown of ozone depleting substances. The concentration of ozone in the ozone layer is usually under 10 parts ozone per million 5. Ozone layer definition is an atmospheric layer at heights of about 20 to 30 miles 32 to 48 kilometers that is normally characterized by high ozone content which blocks most solar ultraviolet radiation from entry into the lower atmosphere. But the one and the most important reason for ozone layer depletion is the. Ozone layer depletion causes, effects and solutions 7. What is the ozone layer and how does it affect you.
Volkmar hasse, gtz proklima, germany preface volkmar hasse, gtz proklima i. Why the ozone layer is vital to life on earth the ozone layer is a protective shield that blocks the suns harmful ultraviolet rays from reaching the earths surface. In this lesson, you will learn the importance of the ozone layer and how it is depleted. As a result the total amount of ozone remains constant. The ozone layer is repairing itself, affecting wind. Approximately 90 percent of the atmospheres ozone occurs from 1018 km 611 miles to about 50 km about 30 miles above earths surface. Low temperatures, increase in the level of chlorine and bromine gases in the upper stratosphere are some of the reasons that leads to ozone layer depletion. The first report of depletion in o 3 layer came out in the 1980s by an atmospheric scientist in antarctica. Ozone is a gas made up of molecules that are formed by three oxygen atoms. Pdf causes of ozone layer depletion and its effects on. Ozone layer the ozone layer is basically naturally occurring gas in the region of stratosphere where ozone particles are accumulated 2. 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. Ozone holes are popular names for areas of damage to the ozone layer. The ozone depletion was analyzed by our top scientists in our research and development lab and we came to many conclusions.
In 1985, an extreme depletion of ozone over antarctica was discoveredthe socalled antarctic ozone hole. The main things that lead to destruction of the ozone gas in the ozone layer. Causes, effects and solutions of ozone layer depletion. 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. Ozone depletion, gradual thinning of earths ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. A resource that can be produced or replaced by a healthy ecosystem is an renewable. The concept of ozoneforming potential and its quantification in any given airshed, it is common to find hundreds of different voc species, each with its own unique chemistry. This site is like a library, use search box in the widget to get ebook that you want. This, in turn, will lead to the breakdown of ozone. Cfc molecules are highly stable and can last for up to 100 years. The ozone hole is not really a hole but a thinning of the ozone layer over the south polar region. During the long winter months of darkness over the antarctic, atmospheric temperatures drop. Interaction between climate system and ozone layer. Key concept human activities affect the atmosphere.
The mesosphere and thermosphere protect earth from meteorites. The ozone layer is mainly found in the lower portion of the stratosphere. Solomon and albritton, 1992 as a measure of the effectiveness of a given compound in removing ozone, relative to a standard compound, which is taken to be cfc11. Pdf ozone in the stratosphere is constantly being produced and. In the 1970s, people all over the world started realizing that the ozone layer was getting thinner and that this was a bad thing. The reaction of ozone with various chemicals, gases, and even some lubricating oils causes a faint luminescence that can be detected by a sensitive. Stratospheric ozone depletion, ultraviolet radiation and health. Frequently asked questions about the ozone layer ozone. Basic knowledge of ozone layer depletion definition. You will also study the research and policy that has been. Timeline of stratospheric ozone depletion and observations. The ozone layer in the stratosphere protects living things by absorbing harmful ultraviolet radiation.
Indias integrated approach to protect the ozone layer. This layer absorbs the radiations and prohibits them from entering the outer surface of the earth. The ozone layer was discovered in 19 by the french physicists. Is depletion of the ozone layer the principal cause. Hence, cfcs are transporting agents that are responsible for damaging the ozone layer. The most commonly known example is the ozone layer, in which ozone is produced by ultra violet rays uv, which derive from the sun.
Every year, since at least 1978, there is a sudden, rapid decrease in the stratospheric ozone levels at the end of the antarctic winter. Is depletion of the ozone layer the principal cause of climate change. Key concept how do air pressure and temperature change as altitude increases. The function of the ozone layer is to shield the earth from the harmful ultraviolet rays of the sun and to keep the earth warm. Ozone in the stratospherea layer of the atmosphere between 15 and 50 kilometers. The latter phenomenon is referred to as the ozone hole. Ozone is naturally produced through certain types of chemical reactions. The concept of ozoneforming potential and its quantification. The concern is because of the fact that the ozone layer plays a protective role, screening the earth from harmful ultraviolet radiations.
This layer serves as a shield that protects the earth from harmful ultraviolet radiation from the sun. The ozone layer refers to a region of earths stratosphere that absorbs most of the suns uv radiation. This layer absorbs 9799% of the suns high frequency ultraviolet light, which is potentially damaging to life on earth. The concept of ozone depletion potential odp is widely used wuebbles et al.
Ozone is created in the stratosphere when uv radiation from the sun strikes molecules of oxygen o2 and causes the two oxygen atoms to split apart. Ozone depletion occurs when the natural balance between the production and destruction of ozone in the stratosphere is tipped in favour of destruction. The ozone hole is shown in purple above the antarctic on sept. Worksheets are activity pack for key stages 2 3, national aeronautics and the ozone hole space administratio n, name date class, note in the information box at the bottom of the screen, airnow teacher toolkit for teachers, chapter 15 reinforcement work earths amazing atmosphere, atmosphere, cross. The sun propagates ultraviolet radiations which as an adverse effect on living beings.
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