[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-487134-105":3,"detail-sidebar-cat-0-en-105":81,"doc-detail-487134-en":131},{"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","why-leaves-change-color-practice-questions","Why Leaves Change Color - Practice Questions","","A reading passage explains how autumn leaf colors develop through changes in plant chemistry. It describes chlorophyll as the dominant green pigment during summer, then explains how its production shuts down in autumn, allowing carotenoids to reveal yellows and oranges. It further details how trees manufacture anthocyanins in autumn to create reds and purples, influenced by weather patterns. The text connects leaf drop to an abscission layer that helps trees survive winter by reducing water loss.",{"@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/exam/","Exam",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/why-leaves-change-color-practice-questions/487134/",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/why-leaves-change-color-practice-questions/487134.png","ImageObject",300,407,{"name":42,"@type":43},"dawugda","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-11-06","2026-09-30",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",18,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"Why do green leaves look green all summer instead of yellow or orange?","Question",{"text":63,"@type":64},"Chlorophyll is so abundant that it hides the other pigments underneath.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"How does the article’s structure help build understanding of fall color?",{"text":68,"@type":64},"It moves from the green pigment to yellows, then reds, and finally leaf drop.",{"name":70,"@type":61,"acceptedAnswer":71},"What weather pattern most favors an especially bright red autumn display?",{"text":72,"@type":64},"Warm, sunny days followed by cool, crisp nights.","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},487134,1790926459,{"code":4,"msg":82,"data":83},"success",[84,88,92,95,100,105,110,115,120,123,127],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":93,"slug":94},70,"exam",{"id":96,"doc_module":4,"doc_module_name":25,"category_name":97,"show_sort_weight":98,"slug":99},5,"Comic",60,"comic",{"id":101,"doc_module":4,"doc_module_name":25,"category_name":102,"show_sort_weight":103,"slug":104},6,"Technology",50,"technology",{"id":106,"doc_module":4,"doc_module_name":25,"category_name":107,"show_sort_weight":108,"slug":109},7,"Healthcare",40,"healthcare",{"id":111,"doc_module":4,"doc_module_name":25,"category_name":112,"show_sort_weight":113,"slug":114},8,"Research & Report",30,"research-report",{"id":116,"doc_module":4,"doc_module_name":25,"category_name":117,"show_sort_weight":118,"slug":119},9,"Religion & Spirituality",20,"religion-spirituality",{"id":118,"doc_module":4,"doc_module_name":25,"category_name":121,"show_sort_weight":118,"slug":122},"World Cup","world-cup",{"id":124,"doc_module":4,"doc_module_name":25,"category_name":125,"show_sort_weight":124,"slug":126},10,"Lifestyle","lifestyle",{"id":128,"doc_module":4,"doc_module_name":25,"category_name":129,"show_sort_weight":96,"slug":130},19,"General","general",{"code":4,"msg":82,"data":132},{"doc_id":79,"user_id":133,"nickname":42,"user_avatar":134,"doc_module":4,"category_id":33,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":111,"language":140,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":12,"update_tm":144,"read_time":118,"preview_page_count":4},3985747870947,"https://ap-avatar.wpscdn.com/davatar_3d24733baf745e90a7e4bdd5f77d97b2","Picture a green leaf as a tiny solar-powered factory running all summer long, humming with a chemical called chlorophyll. This green pigment is the star of photosynthesis, the process plants use to turn sunlight, water, and air into food. There is so much chlorophyll packed into a leaf that it drowns out every other color hiding underneath. So when a maple blazes orange or a birch glows gold in October, you are not watching new paint appear. You are watching the green curtain finally fall away.  \nThat curtain drops because of a clock, not a paintbrush. As autumn nights  \ngrow longer, trees sense the change and begin to shut their food factories down for winter. They stop making chlorophyll, and the green they worked so hard to build starts breaking apart and fading. Once it is gone, colors called carotenoids step into the spotlight, painting leaves yellow and orange. Here is the surprise: those pigments were inside the leaf the whole time, quietly helping capture sunlight all summer.  \nIf yellows and oranges are old news, the fiery reds are the season's new arrivals. Unlike carotenoids, the pigments called anthocyanins are not waiting in the leaf ahead of time. Trees actually manufacture them in autumn, building the reds and purples fresh as the days shorten. Scientists still debate exactly why a tree would spend energy making new color while it is closing up shop. One leading idea is that the red acts like sunscreen, shielding the leaf while the tree pulls back valuable nutrients to store for spring.  \nBecause reds are made to order, they explain why no two autumns look quite the same. Anthocyanins form best during warm, sunny days followed by cool, crisp nights, which is why some years the hills turn shockingly bright. A wet spring, a mild fall, and clear afternoons all tilt the odds toward a spectacular show. But a summer drought or a stretch of gray, gloomy weather can leave the same forest looking dull and brown. This is why leaf-peepers in places like Vermont watch the weather as closely as any farmer.  \nAll that color, though, is really the tree saying goodbye to its leaves. At the base of each  \nleaf stalk, the tree grows a special layer of cells called the abscission layer, a kind of built-in trap door. This layer slowly seals off the leaf from the branch, cutting the water and food it once received. Eventually a gust of wind or a heavy rain is all it takes to send the leaf spinning to the ground. Dropping its leaves lets the tree survive winter, when frozen ground makes water almost impossible to drink.  \nSo the next time a crunchy leaf skitters across your Halloween path, remember it is a used-up solar panel with a hidden history. The gold was always there, the red was made in a rush, and the green simply ran out of time. Trees that keep their leaves through winter, like pines, cheat the whole system with tough, waxy needles built to last. Meanwhile, a single large tree can drop hundreds of thousands of leaves in one autumn. Every one of them is a small chemistry experiment that finished right on schedule.  \nWhy Leaves Change Color  \nName:  \n\n| Solve each problem.\u003Cbr>Use the article to answer the question.\u003Cbr>1) According to the passage, why do green leaves look green all summer instead of yellow or orange?\u003Cbr>A. The abscission layer keeps color from forming in the leaf\u003Cbr>B. Chlorophyll is so abundant that it hides the other pigments underneath\u003Cbr>C. Carotenoids are not produced by the leaf until winter arrives\u003Cbr>D. Anthocyanins block sunlight from reaching the leaf's surface |  |  |  |  | Answers\u003Cbr>1.  \u003Cbr>2.  \u003Cbr>3.  \u003Cbr>4.   |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n| 2) How does the article's structure help build understanding of fall color?\u003Cbr>A. It moves from the green pigment to yellows, then reds, then leaf drop\u003Cbr>B. It lists every type of tree that changes color each fall\u003Cbr>C. It compares Halloween traditions in several different countries\u003Cbr>D. It begins with","cbCaiksNpqZTTFaE","https://ap.wps.com/l/cbCaiksNpqZTTFaE","pdf",103868,"English","# Questions\n## Chlorophyll and pigments\n## Anthocyanins timing\n## Leaf drop and winter survival\n## Structure and weather influence","[{\"question\":\"Why do green leaves look green all summer instead of yellow or orange?\",\"answer\":\"Chlorophyll is so abundant that it hides the other pigments underneath.\"},{\"question\":\"How does the article’s structure help build understanding of fall color?\",\"answer\":\"It moves from the green pigment to yellows, then reds, and finally leaf drop.\"},{\"question\":\"What weather pattern most favors an especially bright red autumn display?\",\"answer\":\"Warm, sunny days followed by cool, crisp nights.\"}]","Why Leaves Change Color - Practice Questions | PDF",1790807885]