Here is the classification for each change:<\/p>\n\n\n\n
(a) Melting ice by spreading salt on an icy sidewalk<\/strong> \u2013 Physical change<\/strong> Changes in matter are either physical or chemical. A physical change<\/strong> alters the form or appearance of a substance but does not change its composition. No new substances are formed. Examples include changes in state, size, or shape. A chemical change<\/strong> involves a transformation at the molecular level, producing one or more new substances with different properties.<\/p>\n\n\n\n (a)<\/strong> When salt is used to melt ice, the process involves dissolving salt into water and lowering the freezing point. The water changes state but remains H\u2082O. This is a physical change.<\/p>\n\n\n\n (b)<\/strong> Striking a match causes a chemical reaction involving friction, heat, and oxygen. New substances like smoke, gases, and ash form. This is a chemical change.<\/p>\n\n\n\n (c)<\/strong> Bending and eventually breaking a metal piece only changes its shape or structure. Its composition stays the same. This is a physical change.<\/p>\n\n\n\n (d)<\/strong> Baking a cake causes ingredients to react under heat. Chemical bonds break and reform, producing gases and a new structure. This is a chemical change.<\/p>\n\n\n\n (e)<\/strong> Rubbing your hands generates heat due to friction. This only affects temperature, not substance identity. It is a physical change.<\/p>\n\n\n\n (f)<\/strong> Steeping a tea bag releases flavor and color through diffusion. The tea leaves remain chemically the same. This is a physical change.<\/p>\n\n\n\n (g)<\/strong> Cooking a hot dog involves heat-driven reactions that change proteins and other molecules. This is a chemical change.<\/p>\n\n\n\n Classify each of the following as a chemical change or a physical change: (a) Melting ice by spreading salt on an icy sidewalk (b) Striking a match (c) Breaking a piece of metal by bending it back and forth (d) Baking a cake (e) Rubbing your hands together to get them warm (f) Using a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-238827","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/238827","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=238827"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/238827\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=238827"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=238827"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=238827"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
(b) Striking a match<\/strong> \u2013 Chemical change<\/strong>
(c) Breaking a piece of metal by bending it back and forth<\/strong> \u2013 Physical change<\/strong>
(d) Baking a cake<\/strong> \u2013 Chemical change<\/strong>
(e) Rubbing your hands together to get them warm<\/strong> \u2013 Physical change<\/strong>
(f) Using a tea bag<\/strong> \u2013 Physical change<\/strong>
(g) Cooking a hot dog<\/strong> \u2013 Chemical change<\/strong><\/p>\n\n\n\nExplanation:<\/h3>\n\n\n\n
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