[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-487131-105":59,"doc-detail-487131-en":131},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":124,"head_meta":126,"extra_data":128,"updated_unix":130},105,"en","why-leaves-change-color-question-set","Why Leaves Change Color - Question Set","","Autumn leaf color is explained as a reveal rather than a new painting: chlorophyll masks other pigments through summer, then breaks down as days shorten and temperatures cool. Yellow and orange tones come from carotenoids, while reds and purples come from anthocyanins that trees manufacture in autumn to help protect leaves as nutrients drain. The passage links color intensity to weather, and describes ecological and human importance through soil enrichment, tourism appeal, and scientific study.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/why-leaves-change-color-question-set/487131/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/why-leaves-change-color-question-set/487131.png","ImageObject",300,407,{"name":92,"@type":93},"dawugda","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-06","2026-09-30",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",12,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What causes leaves to change color in autumn, according to the passage?","Question",{"text":113,"@type":114},"Chlorophyll fades as days get shorter and cooler, revealing existing pigments and newly produced pigments in some colors.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"Where do yellow and orange leaf colors come from?",{"text":118,"@type":114},"They come from carotenoids, a family of chemicals related to foods like carrots and egg yolks.",{"name":120,"@type":111,"acceptedAnswer":121},"How do anthocyanins help explain different red displays across years?",{"text":122,"@type":114},"Trees produce more anthocyanins when autumn follows warm, sunny days and cool but not freezing nights; drought or early frost can reduce the display.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},487131,1790884556,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":39,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":46,"preview_page_count":4},3985747870947,"https://ap-avatar.wpscdn.com/davatar_3d24733baf745e90a7e4bdd5f77d97b2","Here's something that sounds impossible: the golden yellow bursting from that October maple was hiding inside the leaf all summer long. You just couldn't see it. For months, a green pigment called chlorophyll painted over every other color, the way a bright coat of paint hides the wood underneath. When autumn arrives and the green finally fades, the leaf reveals shades that were there the whole time. So a tree in fall isn't really changing its colors — it's finally showing them off.  \nTo understand that reveal, you have to know what chlorophyll was busy doing  \nall summer. This green pigment is a food factory, using sunlight to turn air and water into sugar in a process called photosynthesis. As autumn days grow shorter and cooler, a tree senses the coming winter and stops making new chlorophyll. The old green pigment breaks down and disappears, and suddenly the yellows and oranges get their moment in the spotlight. Those warm colors come from pigments called carotenoids —the same family of chemicals that makes carrots orange and egg yolks yellow.  \nWhile yellows and oranges are simply unmasked, the fiery reds and deep purples are a different story altogether. Those colors come from pigments called anthocyanins, and here's the twist: the tree makes them fresh in autumn, not in summer. A maple or an oak actually manufactures these red pigments as the season turns, partly to protect the leaf while it drains away its last useful nutrients. Think of anthocyanins asa kind of sunscreen the leaf whips up at the last minute. That's why some trees blaze scarlet while their neighbors glow plain gold.  \nThe recipe for red also explains why one autumn can outshine another so dramatically. The brightest displays tend to follow a string of warm, sunny days paired with cool but not freezing nights, because that weather helps trees pump out extra anthocyanins. A summer drought or an early hard frost, on the other hand, can cut the show short and turn leaves dull and brown. Eventually, no matter the colors, the leaf's job is done, and the tree seals off the stem with a special layer of cells. That cork-like seal is exactly why the leaf lets go and drifts to the ground.  \nSo why should any of this matter beyond a pretty view from your window? For one, those  \nfalling leaves feed the forest, rotting into rich soil that nourishes next spring's growth, so autumn's ending is really a beginning. Fall color also draws travelers by the millions to places like New England every year, turning red maples into a genuine part of the local economy. And scientists still study anthocyanins because those same red pigments show up in blueberries, red cabbage, and other foods thought to be good for us. The next time a scarlet leaf spins past you, remember — you're watching chemistry that spent all summer waiting for its turn.  \nWhy Leaves Change Color  \nName:  \n\n| Solve each problem.\u003Cbr>Use the article to answer the question.\u003Cbr>1) According to the passage, what is the central idea about autumn leaves?\u003Cbr>A. Trees deliberately paint their leaves new colors to attract migrating birds each fall\u003Cbr>B. Leaves change color only because the weather grows colder and wetter in autumn\u003Cbr>C. The colors appear because leaves absorb minerals from the soil as they die\u003Cbr>D. The colors were mostly present all along and become visible when green fades or new pigments form |  |  |  |  | Answers\u003Cbr>1.  \u003Cbr>2.  \u003Cbr>3.  \u003Cbr>4.   |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n| 2) According to the passage, how do fallen leaves benefit the forest?\u003Cbr>A. They release stored anthocyanins that speed up the next year's colors\u003Cbr>B. They block sunlight so smaller plants do not overcrowd the forest\u003Cbr>C. They shelter the roots of the tree from freezing winter temperatures\u003Cbr>D. They rot into rich soil that nourishes next spring's new growth |  |  |  |  | 5.  \u003Cbr>6.  \u003Cbr>7.   |  |  |  |  |  |\n| 3) How are anthocyanins different from carotenoids, accord","cbCaibTDJ6T94HWL","https://ap.wps.com/l/cbCaibTDJ6T94HWL","pdf",104301,"English","# Solve each problem\n## Central idea about autumn leaves\n## Benefits of fallen leaves\n## Difference between anthocyanins and carotenoids\n## Role of the final paragraph\n## Author’s point of view\n## Chlorophyll’s role in summer\n## Meaning of the “sunscreen” comparison","[{\"question\":\"What causes leaves to change color in autumn, according to the passage?\",\"answer\":\"Chlorophyll fades as days get shorter and cooler, revealing existing pigments and newly produced pigments in some colors.\"},{\"question\":\"Where do yellow and orange leaf colors come from?\",\"answer\":\"They come from carotenoids, a family of chemicals related to foods like carrots and egg yolks.\"},{\"question\":\"How do anthocyanins help explain different red displays across years?\",\"answer\":\"Trees produce more anthocyanins when autumn follows warm, sunny days and cool but not freezing nights; drought or early frost can reduce the display.\"}]","Why Leaves Change Color - Question Set | PDF",1790807885]