[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-413989-105":3,"detail-sidebar-cat-0-en-105":81,"doc-detail-413989-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":74,"head_meta":76,"extra_data":78,"updated_unix":80},105,"en","chemical-change-introduction","Chemical Change - Introduction","","Chemical change explains how everyday reactions transform substances into new materials with distinct properties and identities. Burning wood in a match releases heat and light, demonstrating energy absorption or release without creating or destroying energy. Matter is also not created or destroyed; it is merely rearranged as chemicals and wood become products such as ash and gases. The concept continues in nature as plants, animals, and humans convert inputs into the substances needed for living, while chemists apply these processes to produce fibers, drugs, plastics, and fertilizers.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/healthcare/","Healthcare",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/chemical-change-introduction/413989/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/chemical-change-introduction/413989.png","ImageObject",300,407,{"name":42,"@type":43},"Alex Sinclair","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-11-06","2026-09-28",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",5,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"What is a chemical change?","Question",{"text":63,"@type":64},"A chemical change occurs when substances are mixed or react and turn into something new and different. The new substances have different appearances, sensations, and chemical identities.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"What happens to energy during chemical changes?",{"text":68,"@type":64},"Energy is absorbed or released. In burning, a chemical change releases heat and light energy, showing energy is changed but not created or destroyed.",{"name":70,"@type":61,"acceptedAnswer":71},"How do chemical changes affect matter?",{"text":72,"@type":64},"Chemical changes neither destroy matter nor create it; matter is merely changed. For example, burned wood becomes ash and gases.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},413989,1792180977,{"code":4,"msg":82,"data":83},"success",[84,88,92,96,100,105,109,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & 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Information for Adults\n\nA chemical change occurs whenever a candle burns,iron rusts,milk turns sour,or an egg becomes rotten.The candle,iron,milk,and egg are chemicallychanged into new and different substances.Not only do the new substanceslook,feel,smell,or taste different;they also have completely different chemicalidentities.  \nWhen a chemical change occurs,energy is either absorbed or released.If youstrike a wooden match,the chemical change in the burning wood releases bothheat and light energy.In this example,and in all chemical changes,energy hasneither been created nor destroyed,only changed.The potential energy of thechemicals and wood were changed into heat and light energy.Likewise,chemical changes neither destroy matter nor create it;the matter is merelychanged.In the burning wood example,the chemicals and wood are changedinto ash and gases.  \nChemical changes occur continuously in nature and make life possible.Greenplants use energy from the sun to convert chemicals in their leaves and carbondioxide from the air into food.When plants are eaten by animals,their bodieschemically change the food into new substances they need to move,keep warm,and grow.Chemical changes help cows and hens change the food they eat intomilk or eggs.When we eat food from plants or animals,our bodies also changethe food into chemicals we need.  \nScientists called chemists have studied chemical changes that occur in nature.They have been able to use chemical changes to create many useful substancesthat do not occur naturally.Artificial fibers,drugs,plastics,and fertilizers aresome of the useful products chemists have produced to improve our daily lives.  \nDesign:PC&F Inc.  \nCover Photograph:HW/R Productions  \nPhotographs:4-7,10 HW/R Productions  \nIIlustrations:title page,12-13,16-17 Michael Adams;2-3,8,9,10-11,14-15 Larry Raymond  \nWhen things are mixed together andthey change into something new anddifferent,the change is called achemical change.  \n2  \nMilk is turned into cheesewhen it is mixed with somelemon juice and stirred.  \nWhen flour,baking powder,milk,and margarineare mixed together andheated in the oven,they turn into biscuits.  \n3  \nThe chemicals in a match headchange when they are lit.Theflame gives off light and heat andgases as the chemicals burn.Theburned match head changes to adifferent color.  \nWhen wax candles burn,they changetoo.The hot flame burns the wax andwick and changes them into newsubstances.  \nOne of the new substances is calledcarbon.We can collect it on a saucerheld carefully above the flame.  \nCarbon looks like black soot.  \nBurning uses oxygen,a gasthat is in the air.About one-fifthof the air is oxygen.  \nBurning makes new  \nsubstances.Water is madewhile a candle burns,and agas,carbon dioxide,is madefrom the carbon in the waxand the oxygen in the air.  \n心)  \n鲜  \n8","cbCaii6beoUkLWEZ","https://ap.wps.com/l/cbCaii6beoUkLWEZ","pdf",2343037,"English","# Background Information for Adults\n## Energy in Chemical Changes\n## Chemical Changes in Nature\n## How Chemists Use Chemical Changes\n## Examples of Chemical Changes","[{\"question\":\"What is a chemical change?\",\"answer\":\"A chemical change occurs when substances are mixed or react and turn into something new and different. The new substances have different appearances, sensations, and chemical identities.\"},{\"question\":\"What happens to energy during chemical changes?\",\"answer\":\"Energy is absorbed or released. In burning, a chemical change releases heat and light energy, showing energy is changed but not created or destroyed.\"},{\"question\":\"How do chemical changes affect matter?\",\"answer\":\"Chemical changes neither destroy matter nor create it; matter is merely changed. For example, burned wood becomes ash and gases.\"}]","Chemical Change - Introduction | PDF",1790596326]