This 250-word reading passage introduces Grade 4 students to the internal structure of leaves, aligned with NGSS standard 4-LS1-1 and Disciplinary Core Idea LS1.A. Students discover how leaves contain specialized parts that work together to help plants survive. The passage explains the waxy coating (cuticle) that prevents water loss, tiny openings called stomata that allow gas exchange, and green cells containing chloroplasts that capture sunlight to make food. Through clear explanations and relatable examples, students build foundational understanding of plant structures and their functions. The passage includes bolded vocabulary terms with immediate definitions, making complex concepts accessible to fourth-grade readers. Audio integration supports diverse learners by providing multiple ways to access the content. Accompanying activities include multiple-choice questions testing recall and comprehension, writing prompts that encourage students to explain and apply their understanding, and graphic organizers that help students visualize the relationship between leaf structures and their functions. This comprehensive resource prepares students for hands-on investigations and deeper exploration of how plants meet their basic needs through specialized structures.
Written by Workybooks TeamPublished by Workybooks
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Anatomy of a leaf.
A leaf is a plant part that makes food for the plant. Inside and outside a leaf, there are special parts that each do an important job. Understanding these parts helps us see how plants stay alive and healthy.
The outside of a leaf has a waxy coating called the cuticle. This coating is like a raincoat for the leaf. It keeps water inside the plant so the leaf does not dry out. Without this coating, the plant would lose too much water and die.
On the bottom side of most leaves are tiny openings called stomata. These openings are so small you need a microscope to see them. Stomata let air move in and out of the leaf. Plants need air to make food and to release the oxygen we breathe. The stomata can open and close like tiny doors to control how much air and water vapor moves through them.
Inside the leaf are green cells that contain chloroplasts. Chloroplasts are tiny structures that capture sunlight. They use the sun's energy, along with air and water, to make food for the plant. This is why leaves are usually green—the chloroplasts give them their color. Each part of the leaf works together to help the plant survive and grow.
Interesting Fact: A single leaf can have thousands or even millions of stomata on its underside, and they open during the day to let air in and close at night to save water!
What does a leaf make for plants?
FoodRootsSeedsFlowers
What is the waxy coating called?
StomataCuticleChloroplastCell wall
Where are stomata located on a leaf?
On the top sideOn the stemOn the bottom sideInside the cells
Why do chloroplasts make leaves green?
They reflect green lightThey contain green pigmentThey absorb waterThey store food
How do stomata help control water?
They store extra waterThey make water for plantsThey open and close like doorsThey remove water from air
What do chloroplasts use to make food?
Sunlight, air, and waterOnly sunlightSoil and rocksSeeds and roots
Leaves can survive without a waxy coating.
TrueFalse
What are stomata?
Green structures that capture sunlightTiny openings that let air passWaxy coatings on leavesLarge cells that store food