Parts of Plant Stems

About this printable Parts of Plant Stems science reading passage, NGSS-aligned (Grades 3-5)

This engaging 250-word reading passage introduces fourth-grade students to the internal structure and function of plant stems, aligned with NGSS standard 4-LS1-1 and the LS1.A Disciplinary Core Idea. Students discover that stems are not simply supports but complex transport systems containing specialized tubes that move water from roots to leaves and food from leaves throughout the plant. The passage uses the familiar celery stalk demonstration with colored water to make abstract concepts concrete and observable. Written at a Grade 4 reading level, the content includes age-appropriate vocabulary with clear definitions, relatable analogies comparing stem tubes to drinking straws, and real-world connections. The passage is audio-integrated to support diverse learners and includes a simplified differentiated version for students reading below grade level. Both English and Spanish translations are provided to support multilingual classrooms. Accompanying activities include multiple-choice comprehension questions testing recall and application, writing prompts requiring explanatory responses, and graphic organizers for visualizing structure-function relationships. This comprehensive resource builds foundational understanding of plant structures and their functions, preparing students for hands-on investigations and deeper exploration of how organisms meet their basic needs for survival.

Written by Workybooks TeamPublished by Workybooks

Sample passage and quiz from Parts of Plant Stems

A stem is the part of a plant that connects the roots to the leaves and flowers. Stems are important because they hold the plant upright and carry materials that the plant needs to survive. Without stems, plants could not get water from the soil to their leaves or send food from the leaves to other parts of the plant.

When you cut open a stem, you can see it is not solid inside. A stem contains special tubes that work like tiny pipes. Xylem (ZY-lem) tubes carry water and minerals up from the roots to the leaves. Think of xylem like a drinking straw that pulls water upward. Phloem (FLO-em) tubes carry food made in the leaves down to the rest of the plant. These tubes move the sugar that leaves make during photosynthesis to the roots, stems, and flowers.

The outside of the stem has a protective outer layer that keeps the plant safe from damage and helps it stay strong. This layer is like the bark on a tree trunk.

You can see how stems transport water by doing a simple experiment. Place a celery stalk in a cup of water mixed with food coloring. After a few hours, cut the celery open. You will see colored lines running through the stem. These lines are the xylem tubes that carried the colored water up from the cup. This shows that stems are not just sticks—they are transport highways moving water and food throughout the plant.

Interesting Fact: Some plants, like bamboo, can grow more than three feet in just one day because their stems have very efficient transport tubes that quickly move water and nutrients!