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The document defines invertebrates as animals lacking a backbone and provides a structured matching exercise where students pair specific animals, such as snails, jellyfish, and earthworms, with their scientific classifications, including Mollusks, Arthropods, Annelids, Cnidaria, Echinoderms, and Porifera. Each category is briefly described by key biological traits like body structure, skeletal type, or habitat, reinforcing scientific literacy through visual and descriptive classification. The inclusion of an answer key makes this resource ideal for classroom instruction or independent home practice, ensuring students can accurately identify and categorize different invertebrate species based on their unique physiological features and living environments.",{"@graph":69,"@context":122},[70,84,105],{"@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/invertebrate-classification-grade-3-science-worksheet/558690/",{"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/invertebrate-classification-grade-3-science-worksheet/558690.png","ImageObject",300,407,{"name":92,"@type":93},"acoobca","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-12",true,{"@type":102,"interactionType":103,"userInteractionCount":29},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What are invertebrates?","Question",{"text":112,"@type":113},"Invertebrates are animals that do not have a backbone.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What are the primary characteristics of a Mollusk?",{"text":117,"@type":113},"Mollusks are characterized by having a soft body and a shell.",{"name":119,"@type":110,"acceptedAnswer":120},"How are Echinoderms identified?",{"text":121,"@type":113},"Echinoderms live in water, exhibit radial symmetry, and possess spines or spiny skin.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},558690,1792161108,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":29,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":14,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":24,"preview_page_count":4},3985747870733,"https://ap-avatar.wpscdn.com/davatar_a8503ba1806abce46bf441b54a3ca4cd","Invertebrate classification  \nGrade 3 Science Worksheet  \nAnimals with no backbone are called invertebrates.  \nMatch each invertebrate to its classification.  \n\n| Mollusks\u003Cbr>soft body with a shell |\n| --- |\n| Arthropods\u003Cbr>exoskelton and jointed legs |\n| Annelids (worms)\u003Cbr>long, segmented body |\n| Cnidaria\u003Cbr>live in water, have stinging cells |\n| Echinoderms\u003Cbr>live in water, radial symmetry, have spines or spiny skin |\n| Porifera\u003Cbr>spongy, live in water |\n\n\n| \u003Cbr>sea sponge |\n| --- |\n| \u003Cbr>jellyfish |\n| snail\u003Cbr>|\n| \u003Cbr>cricket |\n| \u003Cbr>earthworm |\n| \u003Cbr>sea star |\n\nAnswers  \n| Mollusks\u003Cbr>soft body with a shell |\n| --- |\n| Arthropods\u003Cbr>exoskelton and jointed legs |\n| Annelids (worms)\u003Cbr>long, segmented body |\n| Cnidaria\u003Cbr>live in water, have stinging cells |\n| Echinoderms\u003Cbr>live in water, radial symmetry, have spines or spiny skin |\n| Porifera\u003Cbr>spongy, live in water |\n\n| \u003Cbr>sea sponge |\n| --- |\n| \u003Cbr>jellyfish |\n| snail\u003Cbr>|\n| \u003Cbr>cricket |\n| \u003Cbr>earthworm |\n| \u003Cbr>sea star |","cbCaik2lls2vvo9M","https://ap.wps.com/l/cbCaik2lls2vvo9M","pdf",73069,"English","# Invertebrate Classification\n## Classification Definitions\n## Matching Exercise\n## Answer Key","[{\"question\":\"What are invertebrates?\",\"answer\":\"Invertebrates are animals that do not have a backbone.\"},{\"question\":\"What are the primary characteristics of a Mollusk?\",\"answer\":\"Mollusks are characterized by having a soft body and a shell.\"},{\"question\":\"How are Echinoderms identified?\",\"answer\":\"Echinoderms live in water, exhibit radial symmetry, and possess spines or spiny skin.\"}]","Invertebrate Classification - Grade 3 Science Worksheet | PDF",1791799816]