{"id":3853,"date":"2023-01-09T10:40:52","date_gmt":"2023-01-09T10:40:52","guid":{"rendered":"https:\/\/7thclass.deltapublications.in\/?page_id=3853"},"modified":"2024-12-12T04:42:16","modified_gmt":"2024-12-12T04:42:16","slug":"s-8-a-air-exerts-p-pressure","status":"publish","type":"page","link":"https:\/\/7thclass.deltapublications.in\/index.php\/s-8-a-air-exerts-p-pressure\/","title":{"rendered":"S-8.a Air Exerts  Pressure"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Air Exerts  Pressure<\/strong><\/h2>\n\n\n\n<p class=\"has-text-color has-huge-font-size\" style=\"color:#74008b\"><strong>Key Notes :<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-92e20a3f938abe1dc67fbd248583460f\" style=\"color:#000060\">1. <strong>What is Air Pressure?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Air pressure is the force exerted by the weight of air molecules on a surface.<\/li>\n\n\n\n<li>It is caused by the continuous movement and collisions of air particles against surfaces.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">2. <strong>How Air Exerts Pressure<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Air particles are constantly in motion, and when they collide with objects, they exert force.<\/li>\n\n\n\n<li>The pressure is the result of the number and speed of these collisions.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">3. <strong>Factors Affecting Air Pressure<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Altitude<\/strong>: The higher you go (at higher altitudes), the air pressure decreases because there are fewer air molecules above.<\/li>\n\n\n\n<li><strong>Temperature<\/strong>: Hot air rises, which lowers the air pressure. Cooler air is denser and increases air pressure.<\/li>\n\n\n\n<li><strong>Humidity<\/strong>: More moisture in the air (higher humidity) results in lower air pressure because water vapor is lighter than dry air.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">4. <strong>Measuring Air Pressure<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Air pressure is measured using a <strong>barometer<\/strong>.\n<ul class=\"wp-block-list\">\n<li><strong>Mercury barometer<\/strong>: Measures the height of mercury in a tube.<\/li>\n\n\n\n<li><strong>Aneroid barometer<\/strong>: Measures pressure using a metal chamber that expands or contracts with changes in air pressure.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">5. <strong>Effects of Air Pressure<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Weather<\/strong>: Air pressure influences weather patterns. High pressure is associated with clear skies, and low pressure can lead to storms or rain.<\/li>\n\n\n\n<li><strong>Breathing<\/strong>: Air pressure decreases at higher altitudes, making it harder to breathe, as there is less oxygen in the air.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">6. <strong>Demonstrating Air Pressure<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Vacuum-Sealed Container<\/strong>: When air is removed from a container, it demonstrates how air pressure pushes on the outside of objects, as nothing inside can resist the external air pressure.<\/li>\n\n\n\n<li><strong>Can Crush Experiment<\/strong>: Heating a can, then quickly cooling it in water, causes air pressure outside the can to crush it, showing the effect of atmospheric pressure.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">7. <strong>Everyday Examples of Air Pressure<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Lung Function<\/strong>: Breathing involves changes in air pressure in the lungs.<\/li>\n\n\n\n<li><strong>Balloon Inflation<\/strong>: The air inside a balloon pushes outwards, exerting pressure on the balloon&#8217;s surface.<\/li>\n\n\n\n<li><strong>Weather Systems<\/strong>: Air pressure differences lead to wind, which is caused by air moving from high-pressure areas to low-pressure areas.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-large-font-size\" style=\"color:#d90000\"><strong>Let&#8217;s practice!<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/81508\/192\/482\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-37.png\" alt=\"\" class=\"wp-image-5952\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-37.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-37-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-37-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-37-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/81666\/329\/464\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-32.png\" alt=\"\" class=\"wp-image-5953\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-32.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-32-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-32-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-32-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Air Exerts Pressure Key Notes : 1. What is Air Pressure? 2. How Air Exerts Pressure 3. Factors Affecting Air Pressure 4. Measuring Air Pressure 5. Effects of Air Pressure 6. Demonstrating Air Pressure 7. Everyday Examples of Air Pressure Let&#8217;s practice!<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"footnotes":""},"class_list":["post-3853","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3853","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=3853"}],"version-history":[{"count":14,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3853\/revisions"}],"predecessor-version":[{"id":15233,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3853\/revisions\/15233"}],"wp:attachment":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3853"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}