{"id":3718,"date":"2026-11-15T11:16:50","date_gmt":"2026-11-15T11:16:50","guid":{"rendered":"https:\/\/www.workybooks.com\/blog\/?p=3718"},"modified":"2026-11-15T11:19:25","modified_gmt":"2026-11-15T11:19:25","slug":"4-ls1-1-plant-animal-structures","status":"publish","type":"post","link":"https:\/\/www.workybooks.com\/blog\/4-ls1-1-plant-animal-structures\/","title":{"rendered":"Plant and Animal Structures 4th Grade | 4-LS1-1 Worksheets"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Why does a fennec fox have giant ears? Why does an octopus need three hearts? Questions like these are the heart of&nbsp;<strong>plant and animal structures in 4th grade<\/strong>. Every living thing has parts that help it survive, grow, behave and make more of its kind. This guide covers what the&nbsp;<strong>NGSS 4-LS1-1<\/strong>&nbsp;standard asks, simple ways to teach it, and free&nbsp;<strong>4-LS1-1 worksheets<\/strong>&nbsp;for the classroom or homeschool.<br><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does 4-LS1-1 Ask Kids to Do?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The standard asks 4th graders to build an argument that plants and animals have&nbsp;<strong>internal and external structures<\/strong>&nbsp;that help them survive, grow, behave and reproduce.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In plain words, kids learn about plant and animal structures:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Claim:<\/strong>&nbsp;&#8220;A turtle&#8217;s shell helps it survive.&#8221;<\/li>\n\n\n\n<li><strong>Evidence:<\/strong>\u00a0&#8220;The <a href=\"https:\/\/en.wikipedia.org\/wiki\/Turtle_shell\">shell<\/a> is hard and covers its body.&#8221;<\/li>\n\n\n\n<li><strong>Reasoning:<\/strong>&nbsp;&#8220;Predators can&#8217;t easily bite through it.&#8221;<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"268\" src=\"https:\/\/www.workybooks.com\/blog\/wp-content\/uploads\/2026\/11\/claim-evidence-reasoning-4th-grade-science-1024x268.png\" alt=\"\" class=\"wp-image-3719\" srcset=\"https:\/\/www.workybooks.com\/blog\/wp-content\/uploads\/2026\/11\/claim-evidence-reasoning-4th-grade-science-1024x268.png 1024w, https:\/\/www.workybooks.com\/blog\/wp-content\/uploads\/2026\/11\/claim-evidence-reasoning-4th-grade-science-300x79.png 300w, https:\/\/www.workybooks.com\/blog\/wp-content\/uploads\/2026\/11\/claim-evidence-reasoning-4th-grade-science-768x201.png 768w, https:\/\/www.workybooks.com\/blog\/wp-content\/uploads\/2026\/11\/claim-evidence-reasoning-4th-grade-science.png 1301w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">That is&nbsp;<strong>claim, evidence, reasoning<\/strong>&nbsp;in 4th grade science. It sounds big, but kids do it every time they explain why something works.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Are Internal and External Structures?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A&nbsp;<strong>structure<\/strong>&nbsp;is a body part. A&nbsp;<strong>function<\/strong>&nbsp;is the job that part does.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>External structures<\/strong>&nbsp;are on the outside. You can see them. Think fur, claws, wings, shells, leaves and thorns.<\/li>\n\n\n\n<li><strong>Internal structures<\/strong>&nbsp;are on the inside. You can&#8217;t see them. Think the heart, lungs, gills, stomach and skeleton.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A quick way to explain&nbsp;<strong>structure and function<\/strong>&nbsp;to kids: the structure is the tool, and the function is what the tool does. A bird&#8217;s beak is the tool. Cracking seeds is the job. <strong>plant and animal structures<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"502\" src=\"https:\/\/www.workybooks.com\/blog\/wp-content\/uploads\/2026\/11\/internal-external-animal-structures-4th-grade-1024x502.png\" alt=\"External structures plant and animal structures 4th grade\" class=\"wp-image-3720\" srcset=\"https:\/\/www.workybooks.com\/blog\/wp-content\/uploads\/2026\/11\/internal-external-animal-structures-4th-grade-1024x502.png 1024w, https:\/\/www.workybooks.com\/blog\/wp-content\/uploads\/2026\/11\/internal-external-animal-structures-4th-grade-300x147.png 300w, https:\/\/www.workybooks.com\/blog\/wp-content\/uploads\/2026\/11\/internal-external-animal-structures-4th-grade-768x377.png 768w, https:\/\/www.workybooks.com\/blog\/wp-content\/uploads\/2026\/11\/internal-external-animal-structures-4th-grade.png 1344w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">External Animal Structures and What They Do<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Animals use outside parts to stay safe, find food, move around and handle the weather.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Fur and feathers<\/strong>&nbsp;keep animals warm and dry.<\/li>\n\n\n\n<li><strong>Claws<\/strong>&nbsp;help animals dig, climb and grab food.<\/li>\n\n\n\n<li><strong>Legs<\/strong>&nbsp;help animals run, jump, swim and hop.<\/li>\n\n\n\n<li><strong>Tails<\/strong>&nbsp;help with balance, steering and even sending signals.<\/li>\n\n\n\n<li><strong>Wings<\/strong>&nbsp;let birds, bats and insects fly.<\/li>\n\n\n\n<li><strong>Skin and shells<\/strong>&nbsp;protect soft bodies inside.<\/li>\n\n\n\n<li><strong>Big ears<\/strong>&nbsp;help some animals hear well and cool down.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Desert animals are great examples<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The desert is hot and dry, so animals there have clever parts.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The&nbsp;<strong>fennec fox<\/strong>&nbsp;and&nbsp;<strong>kit fox<\/strong>&nbsp;have huge ears that let body heat escape.<\/li>\n\n\n\n<li>The&nbsp;<strong>kangaroo rat<\/strong>&nbsp;has strong back legs for hopping away from danger.<\/li>\n\n\n\n<li>The&nbsp;<strong>thorny devil<\/strong>&nbsp;has grooved, spiky skin that moves water toward its mouth.<\/li>\n\n\n\n<li>The&nbsp;<strong>Gila monster<\/strong>&nbsp;stores fat in its thick tail, so it can go a long time without eating.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"274\" src=\"https:\/\/www.workybooks.com\/blog\/wp-content\/uploads\/2026\/11\/desert-animal-structures-4th-grade-1024x274.png\" alt=\"Desert animals - Plant and animal structures 4th grade\" class=\"wp-image-3721\" srcset=\"https:\/\/www.workybooks.com\/blog\/wp-content\/uploads\/2026\/11\/desert-animal-structures-4th-grade-1024x274.png 1024w, https:\/\/www.workybooks.com\/blog\/wp-content\/uploads\/2026\/11\/desert-animal-structures-4th-grade-300x80.png 300w, https:\/\/www.workybooks.com\/blog\/wp-content\/uploads\/2026\/11\/desert-animal-structures-4th-grade-768x205.png 768w, https:\/\/www.workybooks.com\/blog\/wp-content\/uploads\/2026\/11\/desert-animal-structures-4th-grade.png 1301w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">External animal structures worksheets (Bundle 1)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.workybooks.com\/bundle\/external-structures-of-animals\"><strong>External Animal Structures and Their Functions (Grade 4, 4-LS1-1)<\/strong><\/a>&nbsp;includes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Animal Body Structures<\/li>\n\n\n\n<li>Animal Claws<\/li>\n\n\n\n<li>Animal External Structures<\/li>\n\n\n\n<li>Animal Structures at Work<\/li>\n\n\n\n<li>Fennec Fox<\/li>\n\n\n\n<li>Gila Monster<\/li>\n\n\n\n<li>How Do Turtles Move?<\/li>\n\n\n\n<li>How Fur and Feathers Help<\/li>\n\n\n\n<li>How Legs Help Animals Move<\/li>\n\n\n\n<li>How Skin Protects Animals<\/li>\n\n\n\n<li>How Tails Help Animals<\/li>\n\n\n\n<li>How Wings Help Animals Fly<\/li>\n\n\n\n<li>Kangaroo Rat<\/li>\n\n\n\n<li>Kit Fox<\/li>\n\n\n\n<li>The Thorny Devil<\/li>\n\n\n\n<li>The Turtle&#8217;s Shell<\/li>\n\n\n\n<li>Why Do Elephants Have Big Ears?<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Internal Animal Structures: The Parts You Can&#8217;t See<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Inside every animal, organs work together to keep it alive.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The&nbsp;<strong>heart<\/strong>&nbsp;pumps blood around the body.<\/li>\n\n\n\n<li><strong>Lungs<\/strong>&nbsp;take in air and pull out oxygen.<\/li>\n\n\n\n<li><strong>Gills<\/strong>&nbsp;let fish take oxygen from water.<\/li>\n\n\n\n<li>The&nbsp;<strong>stomach<\/strong>&nbsp;and gut break down food for energy.<\/li>\n\n\n\n<li>The&nbsp;<strong>skeleton<\/strong>&nbsp;holds the body up and protects soft organs.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Some fun facts kids love:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>An&nbsp;<strong>octopus has three hearts<\/strong>. Two pump blood to the gills, and one pumps it to the rest of the body.<\/li>\n\n\n\n<li><strong>Frogs have lungs<\/strong>, but they can also take in oxygen through their skin.<\/li>\n\n\n\n<li>Insects and crabs have an&nbsp;<strong>exoskeleton<\/strong>. Their skeleton is on the outside, like a suit of armor.<\/li>\n\n\n\n<li>A turtle&#8217;s shell is part of its skeleton. A turtle can&#8217;t climb out of its shell.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Internal animal structures worksheets (Bundle 2)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.workybooks.com\/bundle\/internal-structures-of-animals\"><strong>Internal Animal Structures: Heart, Lungs, Gills, Skeleton (Grade 4, 4-LS1-1)<\/strong><\/a>&nbsp;includes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Animal Internal Structure<\/li>\n\n\n\n<li><a href=\"https:\/\/www.workybooks.com\/reader\/animal-skeleton-structure\" target=\"_blank\" rel=\"noopener\">Animal Skeleton Structure<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.workybooks.com\/reader\/do-frogs-have-lungs\" target=\"_blank\" rel=\"noopener\">Do Frogs Have Lungs?<\/a><\/li>\n\n\n\n<li>How Animal Hearts Work<\/li>\n\n\n\n<li>How Animal Lungs Work<\/li>\n\n\n\n<li><a href=\"https:\/\/www.workybooks.com\/reader\/how-animals-digest-food\" target=\"_blank\" rel=\"noopener\">How Animals Digest Food<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.workybooks.com\/reader\/how-fish-breathe\" target=\"_blank\" rel=\"noopener\">How Fish Breathe<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.workybooks.com\/reader\/how-fish-gills-work\" target=\"_blank\" rel=\"noopener\">How Fish Gills Work<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.workybooks.com\/reader\/how-internal-structures-keep-animals-alive\" target=\"_blank\" rel=\"noopener\">How Internal Structures Keep Animals Alive<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.workybooks.com\/reader\/how-many-hearts-does-an-octopus-have\" target=\"_blank\" rel=\"noopener\">How Many Hearts Does an Octopus Have?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.workybooks.com\/reader\/lungs-vs-gills\" target=\"_blank\" rel=\"noopener\">Lungs vs Gills<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.workybooks.com\/reader\/what-are-exoskeletons\" target=\"_blank\" rel=\"noopener\">What Are Exoskeletons?<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What About Plant Structures?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Plants have structures too, and they work just as hard.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Roots<\/strong>&nbsp;hold the plant in the ground and take in water.<\/li>\n\n\n\n<li><strong>Stems<\/strong>&nbsp;hold the plant up and carry water to the leaves.<\/li>\n\n\n\n<li><strong>Leaves<\/strong>&nbsp;use sunlight to make food.<\/li>\n\n\n\n<li><strong>Flowers<\/strong>&nbsp;make seeds so new plants can grow.<\/li>\n\n\n\n<li><strong>Thorns<\/strong>&nbsp;keep hungry animals away.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Plants also have internal structures. Tiny tubes inside the stem move water up from the roots and food down from the leaves.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">An Easy Activity: Be a Structure Detective<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This takes about 10 minutes and works at home or in class.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Pick one animal picture.<\/li>\n\n\n\n<li>Circle one external structure.<\/li>\n\n\n\n<li>Ask: &#8220;What job does this part do?&#8221;<\/li>\n\n\n\n<li>Ask: &#8220;What would happen if the animal didn&#8217;t have it?&#8221;<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Want to go further? Try&nbsp;<strong>biomimicry<\/strong>. People copy animal parts to build new things. Velcro was inspired by burrs that stick to dog fur. Kids can pick an animal part and sketch a tool based on it.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common Mix-Ups Kids Have<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>&#8220;Structures are only outside parts.&#8221;<\/strong>&nbsp;Inside parts like the heart count too.<\/li>\n\n\n\n<li><strong>&#8220;Fish breathe water.&#8221;<\/strong>&nbsp;Fish don&#8217;t breathe water. Their gills pull oxygen out of the water.<\/li>\n\n\n\n<li><strong>&#8220;Animals grow a part because they need it.&#8221;<\/strong>&nbsp;An animal can&#8217;t decide to grow new parts. Parts change slowly over many, many generations.<\/li>\n\n\n\n<li><strong>&#8220;Plants don&#8217;t have structures.&#8221;<\/strong>&nbsp;Roots, stems and leaves are all structures with jobs.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Tips for Homeschool Families<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Go on a backyard or park walk and spot five external structures.<\/li>\n\n\n\n<li>Look at a chicken drumstick to see bone, muscle and skin.<\/li>\n\n\n\n<li>Compare a pet&#8217;s body parts with a wild animal&#8217;s.<\/li>\n\n\n\n<li>Use one short reading passage a day. Ten minutes is plenty.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Frequently Asked Questions<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1794712399720\"><strong class=\"schema-faq-question\">What are internal and external structures?<\/strong> <p class=\"schema-faq-answer\">External structures are body parts on the outside, like fur or leaves. Internal structures are on the inside, like the heart or roots inside the soil.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1794712431545\"><strong class=\"schema-faq-question\">What are examples of internal structures in animals?<\/strong> <p class=\"schema-faq-answer\">The heart, lungs, gills, stomach, brain and skeleton.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1794712447244\"><strong class=\"schema-faq-question\">What are the external structures of a plant?<\/strong> <p class=\"schema-faq-answer\">Leaves, stems, flowers, thorns and the parts of the roots you can see.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1794712497592\"><strong class=\"schema-faq-question\">How do plant structures help them survive?<\/strong> <p class=\"schema-faq-answer\">Roots get water, leaves make food, flowers make seeds and thorns protect the plant from animals.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1794712506592\"><strong class=\"schema-faq-question\">What is the difference between structure and function?<\/strong> <p class=\"schema-faq-answer\">A structure is a body part. A function is the job that part does.<\/p> <\/div> <\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Get the 4-LS1-1 Worksheets<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ready to teach&nbsp;<strong>plant and animal structures in 4th grade<\/strong>? Grab the&nbsp;<strong>External Animal Structures<\/strong>&nbsp;bundle and the&nbsp;<strong>Internal Animal Structures<\/strong>&nbsp;bundle on Workybooks. Each one has short, kid-friendly reading passages with simple questions, ready to print for class or homeschool.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.workybooks.com\/bundle\/external-structures-of-animals\" target=\"_blank\" rel=\"noopener\"><strong>Get the External Animal Structures bundle<\/strong><\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.workybooks.com\/bundle\/internal-structures-of-animals\" target=\"_blank\" rel=\"noopener\"><strong>Get the Internal Animal Structures bundle<\/strong><\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Why does a fennec fox have giant ears? Why does an octopus need three hearts? Questions like these are the heart of&nbsp;plant and animal structures in 4th grade. Every living thing has parts that help it survive, grow, behave and make more of its kind. This guide covers what the&nbsp;NGSS 4-LS1-1&nbsp;standard asks, simple ways to [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":3726,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-container-style":"default","site-container-layout":"default","site-sidebar-layout":"default","site-transparent-header":"default","prose-style":"enable","disable-article-header":"default","disable-site-header":"default","disable-site-footer":"default","disable-content-area-spacing":"default","footnotes":""},"categories":[283,119,144,95],"tags":[307,213],"class_list":["post-3718","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-elementary-resources","category-grade-4","category-ngss-worksheets","category-science","tag-4th-grade-science","tag-ngss-aligned"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ 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