{"id":23655,"date":"2024-04-15T06:36:31","date_gmt":"2024-04-15T06:36:31","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=23655"},"modified":"2024-04-15T06:36:31","modified_gmt":"2024-04-15T06:36:31","slug":"ozone-layer-in-the-upper-parts-of-the-atmosphere-serves-as-a-protective-shield-against-harmful-a-solar-ultraviolet-radiation-b-solar-infrared-radiation-c-co2-in-the-air-d-so2-in-the-air","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/ozone-layer-in-the-upper-parts-of-the-atmosphere-serves-as-a-protective-shield-against-harmful-a-solar-ultraviolet-radiation-b-solar-infrared-radiation-c-co2-in-the-air-d-so2-in-the-air\/","title":{"rendered":"Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful A. Solar ultraviolet radiation B. Solar infrared radiation C. CO2 in the air D. SO2 in the air"},"content":{"rendered":"<p>\r\n    <!-- Check if it's an AMP page -->\r\n            <!-- Non-AMP version -->\r\n        <div class=\"mcq-container\" data-quiz-id=\"quizState_6aa5d38f4a48c\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"true\">\r\n                    Solar ultraviolet radiation                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    Solar infrared radiation                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    CO2 in the air                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    SO2 in the air                <\/div>\r\n                            \r\n            <!-- Feedback messages for non-AMP -->\r\n            <div class=\"feedback\" data-feedback=\"wrong\">Answer is Right!<\/div>\r\n            <div class=\"feedback\" data-feedback=\"right\">Answer is Wrong!<\/div>\r\n        <\/div>\r\n\r\n        <script>\r\n        document.addEventListener('DOMContentLoaded', function () {\r\n            var containers = document.querySelectorAll('.mcq-container');\r\n\r\n            containers.forEach(function(container) {\r\n                var options = container.querySelectorAll('.option');\r\n                var feedbackSelect = container.querySelector('[data-feedback=\"select\"]');\r\n                var feedbackWrong = container.querySelector('[data-feedback=\"wrong\"]');\r\n                var feedbackRight = container.querySelector('[data-feedback=\"right\"]');\r\n\r\n                options.forEach(function(option) {\r\n                    option.addEventListener('click', function() {\r\n                        var selectedOption = option.getAttribute('data-option-key');\r\n                        var isCorrect = option.getAttribute('data-is-correct') === 'true';\r\n\r\n                        \/\/ Remove previous selections\r\n                        options.forEach(function(opt) {\r\n                            opt.classList.remove('correct', 'incorrect');\r\n                        });\r\n\r\n                        \/\/ Add the correct\/incorrect class\r\n                        if (isCorrect) {\r\n                            option.classList.add('correct');\r\n                            feedbackRight.hidden = false;\r\n                            feedbackWrong.hidden = true;\r\n                        } else {\r\n                            option.classList.add('incorrect');\r\n                            feedbackRight.hidden = true;\r\n                            feedbackWrong.hidden = false;\r\n                        }\r\n\r\n                        \/\/ Hide select feedback\r\n                        feedbackSelect.hidden = true;\r\n                    });\r\n                });\r\n            });\r\n        });\r\n        <\/script>\r\n    \r\n    <!--more--><\/p>\n<p>The ozone layer is a region of Earth&#8217;s stratosphere that absorbs most of the Sun&#8217;s ultraviolet <div class=\"telegram-channel-container\">\r\n        <a href=\"https:\/\/t.me\/pscnotes2025\" target=\"_blank\" class=\"telegram-channel-button\">\r\n            <span class=\"telegram-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 496 512\">\r\n                    <path fill=\"white\" d=\"M248,8C111,8,0,119,0,256s111,248,248,248s248-111,248-248S385,8,248,8z M362,177L320,367c-3,14-10,18-20,14l-56-41l-27,26 c-3,3-5,5-10,5l4-63L323,196c5-5-1-7-8-3l-98,62l-42-13c-9-3-10-9,2-14l162-63C351,160,365,164,362,177z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Join Our Telegram Channel\r\n        <\/a>\r\n    <\/div> radiation. It contains high concentrations of ozone (O3) relative to other parts of the atmosphere, although still small in relation to other gases in the stratosphere. The ozone layer contains less than 10 parts per million of ozone, while the average ozone concentration in Earth&#8217;s atmosphere as a whole is about 0.3 parts per million. The ozone layer is mainly found in the lower portion of the stratosphere, from approximately 20 to 30 kilometers (12 to 19 mi) above Earth, although its thickness varies seasonally and geographically.<\/p>\n<p>The ozone layer is important because it protects life on Earth from harmful ultraviolet radiation. Ultraviolet radiation can cause skin cancer and other health problems, and it can also damage plants and animals. The ozone layer absorbs most of the Sun&#8217;s ultraviolet radiation, preventing it from reaching Earth&#8217;s surface.<\/p>\n<p>The ozone layer is constantly being created and destroyed in a natural cycle. Ozone is created when oxygen molecules (O2) are split by ultraviolet radiation, and the resulting oxygen atoms combine with oxygen molecules to form ozone (O3). Ozone is destroyed when it reacts with other chemicals, such as chlorine and bromine.<\/p>\n<p>Human activities have been shown to damage the ozone layer. Chlorofluorocarbons (CFCs), which were once widely used in refrigerants and aerosol propellants, are one <div class=\"youtube-subscribe-container\">\r\n        <a href=\"https:\/\/www.youtube.com\/channel\/UCNHT8lW-JmLC68rjBfZhdkg?sub_confirmation=1\" target=\"_blank\" class=\"youtube-subscribe-button\">\r\n            <span class=\"youtube-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\">\r\n                    <path d=\"M549.7 124.1c-6.3-23.7-24.8-42.3-48.3-48.6C458.8 64 288 64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Subscribe on YouTube\r\n        <\/a>\r\n    <\/div> of the main causes of ozone depletion. CFCs are released into the atmosphere, where they break down and release chlorine atoms. These chlorine atoms react with ozone molecules, destroying them.<\/p>\n<p>The Montreal Protocol, an international treaty signed in 1987, has helped to reduce the use of CFCs and other ozone-depleting substances. As a result, the ozone layer is slowly recovering. However, it is still important to protect the ozone layer by reducing our use of ozone-depleting substances and by taking other steps to reduce our impact on the environment.<\/p>\n<p>The correct answer is A. Solar ultraviolet radiation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Subscribe on YouTube<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful A. Solar ultraviolet radiation B. Solar infrared radiation C. CO2 in the air D. 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