{"id":3838,"date":"2023-01-09T10:38:38","date_gmt":"2023-01-09T10:38:38","guid":{"rendered":"https:\/\/7thclass.deltapublications.in\/?page_id=3838"},"modified":"2025-09-10T06:51:25","modified_gmt":"2025-09-10T06:51:25","slug":"s-6-a-physical-changes","status":"publish","type":"page","link":"https:\/\/7thclass.deltapublications.in\/index.php\/s-6-a-physical-changes\/","title":{"rendered":"S-6.a Physical Changes"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Physical Changes<\/strong><\/h2>\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\" style=\"flex-basis:100%\">\n<div style=\"position: relative; width: 100%; height: 0; padding-top: 56.2500%;\n padding-bottom: 0; box-shadow: 0 2px 8px 0 rgba(63,69,81,0.16); margin-top: 1.6em; margin-bottom: 0.9em; overflow: hidden;\n border-radius: 8px; will-change: transform;\">\n  <iframe loading=\"lazy\" style=\"position: absolute; width: 100%; height: 100%; top: 0; left: 0; border: none; padding: 0;margin: 0;\"\n    src=\"https:\/\/www.canva.com\/design\/DAF-5Q5qG7Q\/ZqddMs6tLJn1kzV6f39FCg\/watch?embed\" allowfullscreen=\"allowfullscreen\" allow=\"fullscreen\">\n  <\/iframe>\n<\/div>\n<a href=\"https:&#x2F;&#x2F;www.canva.com&#x2F;design&#x2F;DAF-5Q5qG7Q&#x2F;ZqddMs6tLJn1kzV6f39FCg&#x2F;watch?utm_content=DAF-5Q5qG7Q&amp;utm_campaign=designshare&amp;utm_medium=embeds&amp;utm_source=link\" target=\"_blank\" rel=\"noopener\">physical changes<\/a> by Delta publications\n<\/div>\n<\/div>\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-large-font-size\" style=\"color:#000060\"><strong>Definition of Physical Changes<\/strong>:<\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Physical changes are changes in the form or appearance of a substance without altering its chemical composition.<\/li>\n\n\n\n<li>These changes are usually reversible, meaning the substance can return to its original state.<\/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-text-color has-large-font-size\" style=\"color:#000060\"><strong>Characteristics of Physical Changes<\/strong>:<\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>No New Substance Formed<\/strong>: The substance undergoing the change remains the same at the molecular level.<\/li>\n\n\n\n<li><strong>Reversibility<\/strong>: Most physical changes can be undone, such as melting ice into water and refreezing it.<\/li>\n\n\n\n<li><strong>Energy Changes<\/strong>: Physical changes might involve energy changes, such as absorption or release of heat, but they do not involve the breaking or forming of chemical bonds.<\/li>\n\n\n\n<li><strong>Change in State<\/strong>: A common physical change involves a change in the state of matter (solid, liquid, gas), like water freezing or evaporating.<\/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-text-color has-large-font-size\" style=\"color:#000060\"><strong>Examples of Physical Changes<\/strong>:<\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Melting<\/strong>: Ice melting into water.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-18-1024x683.png\" alt=\"\" class=\"wp-image-13915\" style=\"aspect-ratio:1.499267935578331;width:360px;height:auto\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-18-1024x683.png 1024w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-18-300x200.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-18-768x512.png 768w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-18-1536x1024.png 1536w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-18-1568x1045.png 1568w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-18.png 1800w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Freezing<\/strong>: Water freezing into ice.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"405\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-19.png\" alt=\"\" class=\"wp-image-13917\" style=\"aspect-ratio:1.7777777777777777;width:368px;height:auto\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-19.png 720w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-19-300x169.png 300w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/figure><\/div>\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Boiling<\/strong>: Water boiling into steam.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"168\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-20.png\" alt=\"\" class=\"wp-image-13918\" style=\"aspect-ratio:1.7857142857142858;width:368px;height:auto\"\/><\/figure><\/div>\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Condensation<\/strong>: Steam condensing into water.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"640\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/Untitled-design-15-1024x640.png\" alt=\"\" class=\"wp-image-13919\" style=\"aspect-ratio:1.6;width:397px;height:auto\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/Untitled-design-15-1024x640.png 1024w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/Untitled-design-15-300x188.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/Untitled-design-15-768x480.png 768w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/Untitled-design-15.png 1281w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Sublimation<\/strong>: Dry ice (solid carbon dioxide) sublimating into gas.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"356\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/548dc9e6-8e1c-4499-982c-2306e144a35a.png\" alt=\"\" class=\"wp-image-13921\" style=\"aspect-ratio:2;width:448px;height:auto\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/548dc9e6-8e1c-4499-982c-2306e144a35a.png 800w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/548dc9e6-8e1c-4499-982c-2306e144a35a-300x134.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/548dc9e6-8e1c-4499-982c-2306e144a35a-768x342.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure><\/div>\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Dissolving<\/strong>: Sugar dissolving in water.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"534\" height=\"1013\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-22.png\" alt=\"\" class=\"wp-image-13922\" style=\"aspect-ratio:0.527147087857848;width:161px;height:auto\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-22.png 534w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-22-158x300.png 158w\" sizes=\"auto, (max-width: 534px) 100vw, 534px\" \/><\/figure><\/div>\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-text-color has-large-font-size\" style=\"color:#000060\"><strong>Difference Between Physical and Chemical Changes<\/strong>:<\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>In physical changes, the substance\u2019s physical properties change, but its chemical identity remains the same.<\/li>\n\n\n\n<li>In chemical changes, a new substance is formed with different chemical properties.<\/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-text-color has-large-font-size\" style=\"color:#000060\"><strong>Importance of Physical Changes<\/strong>:<\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Understanding physical changes helps in everyday life, like cooking, freezing food, or using substances like salt or sugar.<\/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-text-color has-large-font-size\" style=\"color:#000060\"><strong>Observation of Physical Changes<\/strong>:<\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Physical changes can often be observed through changes in shape, size, texture, or state of matter.<\/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-text-color has-large-font-size\" style=\"color:#000060\"><strong>Real-life Applications<\/strong>:<\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Physical changes are utilized in many processes, such as the purification of water through boiling and condensation (distillation) or the making of ice cream (freezing).<\/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\/77076\/484\/570\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-26.png\" alt=\"\" class=\"wp-image-5917\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-26.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-26-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-26-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-26-400x400.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\/77081\/130\/112\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-21.png\" alt=\"\" class=\"wp-image-5918\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-21.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-21-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-21-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-21-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Physical Changes physical changes by Delta publications Key Notes : Definition of Physical Changes: Characteristics of Physical Changes: Examples of Physical Changes: Difference Between Physical and Chemical Changes: Importance of Physical Changes: Observation of Physical Changes: Real-life Applications: 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-3838","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3838","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=3838"}],"version-history":[{"count":27,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3838\/revisions"}],"predecessor-version":[{"id":16950,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3838\/revisions\/16950"}],"wp:attachment":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3838"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}