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How External Structures Help Plants Survive — Reading Comprehension

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NGSS 4-LS1-1
LS1.A

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This 250-word reading passage introduces fourth-grade students to how external plant structures help plants survive, grow, and reproduce, aligned with NGSS 4-LS1-1 and Disciplinary Core Idea LS1.A. Students explore how roots absorb water and anchor plants, stems provide support and transport, leaves make food through photosynthesis, protective structures defend against threats, and reproductive structures produce and spread seeds. The passage uses simple, age-appropriate language and real-world examples to build foundational understanding of structure-function relationships in plants. Students learn to argue that each external structure serves a specific, essential function for plant survival and reproduction. The content includes audio-integrated features to support diverse learners. Activities include multiple-choice comprehension questions, writing prompts requiring students to explain and apply concepts, and graphic organizers focusing on structure-function relationships. A simplified differentiated version supports students reading below grade level while maintaining the same core science concepts. Spanish translations of both versions ensure accessibility for English language learners. The passage serves as a capstone lesson connecting all external plant structures to survival and reproduction, helping students synthesize their understanding of how plants meet their basic needs through specialized structures.

CONTENT PREVIEW

Labeled plant parts. — External structures help plants survive.

Plants have many different parts on the outside of their bodies called external structures. External structures are the parts of a plant you can see from the outside. Each structure has a special job that helps the plant stay alive, grow bigger, and make new plants.

Roots grow underground and have two important jobs. Roots are the parts of a plant that grow down into the soil. They absorb water and minerals from the soil, which the plant needs to live. Roots also anchor the plant in the ground so it does not blow away in the wind. Think of roots like straws that drink water and also work like tent stakes that hold everything in place.

Stems hold up the plant and carry water and food to different parts. Stems are like the plant's skeleton and highway system combined. They keep leaves up high where they can get sunlight. Leaves make food for the plant through a process called photosynthesis. Photosynthesis happens when leaves use sunlight, water, and air to create sugar that feeds the plant.

Some plants have protective structures like thorns, spines, or thick bark. Protective structures are parts that keep the plant safe from animals that might eat it or from harsh weather. Reproductive structures like flowers and seeds help plants make new plants. Reproductive structures are the parts involved in creating the next generation of plants.

Every external structure on a plant serves a specific purpose. Without roots, stems, leaves, protective structures, and reproductive structures working together, plants could not survive, grow, or reproduce.

Interesting Fact: A single sunflower plant can have roots that spread out more than three feet underground and can drink up to three gallons of water every day!

What do roots absorb from soil?

Water and mineralsSunlight and airSugar and foodSeeds and flowers

What process do leaves use?

ReproductionPhotosynthesisProtectionAnchoring

What do stems carry to plants?

Seeds and pollenThorns and spinesWater and foodRoots and leaves

Why do plants need protective structures?

To make new plantsTo absorb more waterTo keep safe from threatsTo create more food

How do reproductive structures help plants?

They anchor in soilThey make foodThey create new plantsThey absorb water

What would happen without roots?

Plant gets more sunlightPlant cannot get waterPlant makes more foodPlant grows taller