Rainbow in a Jar STEM Experiment: Complete Lesson Plan & Worksheet! Grade 2+

Discover the fascinating concept of density with an engaging, hands-on activity—creating a colorful rainbow in a jar! This fun experiment allows learners to explore how different liquids layer based on their densities, making science both exciting and visually captivating. The below description discusses all that is inside in this newly-designed complete lesson plan... 

Included Topics:

Introduction to Density

Learn how density determines whether substances float or sink, using everyday examples like oil and water. Students will understand the science behind layering liquids and how density creates separation.

Reading Passage: “What Is Density?”

A concise and engaging explanation introduces students to density concepts, including how heavier liquids sink and lighter ones rise. They’ll also learn how to create layers by carefully stacking liquids in a jar.

Hands-On Experiment: Create Your Own Rainbow in a Jar

Step-by-step instructions guide students to layer liquids such as honey, dish soap, water, oil and colored rubbing alcohol, creating a visually stunning rainbow while reinforcing density principles.

Interactive Worksheets and Observations

Students will track the experiment’s process using observation charts and answer thought-provoking questions about density. True/false and short-answer activities help solidify understanding of the concept.

Wrap-Up Discussion

Encourage students to share their results and reflect on their observations. They’ll connect their experiment to real-life examples, such as why certain objects float or sink.

Our Recommendation

This lesson plan blends science and art to make learning fun and interactive. A key highlight from the material is:

“By stacking liquids in a jar, students see how density works in action—turning a scientific concept into a colorful masterpiece.”

Students will develop their understanding of density, improve their observation skills, and enjoy a hands-on activity that sparks creativity.

Why This Resource Is a Must-Have

This engaging activity:

Explains density in simple, relatable terms for young learners.

Combines science and creativity to make learning fun.

Includes a step-by-step guide, ensuring success for both students and teachers.

Reinforces key scientific concepts with structured observation and reflection activities.

Uses common household items, making it a low-prep, high-impact lesson.

Encourages curiosity through hands-on experimentation.

Do purchase this, if the following is something you are looking for:

• A fun, interactive science experiment for grades 2-5+ (ages 7-

8+).

• A hands-on activity that combines science and art, inspiring creativity.

• Ready-to-teach lessons with clear instructions and minimal prep.

• Worksheets and observation tools to support comprehension and reflection.

• Cross-curricular learning that blends STEM and critical thinking.

This resource delivers a memorable learning experience, making density an exciting topic for young scientists while providing teachers with a stress-free, engaging lesson plan.

For Permissions or Inquiries: Contact us before purchase. Unauthorized use or reproduction is prohibited.

Resource Information:

PAGES: 17 Extra Pages, Real Talk: Part of the total page count—these 4-6 clean extras offer a quick look at our origins, rights and terms of use, how to reach us and stay connected, plus an optional tip jar.  Cover pages are NOT within this file! Cover and preview images may vary slightly, and printed colors may appear differently due to printer settings and screen variations.

Ideal for Ages: Students in elementary school (only if they are ready for this type of publication). 7-8+

Teaching Duration: 1 class period, depending on the depth of exploration.

Download Now: This digital resource is available immediately. Please remember to save your files upon download, as download limits may apply depending on the platform.

Reminder: This resource is for single-classroom use only. Please refrain from sharing it outside your class. Feel free to reach out with any questions before downloading. No refunds are available on digital products.

Note: We are not affiliated with any organizations or references mentioned in this document. This material is intended for educational purposes, presented in a kid-friendly tone—not to upset or offend anyone.

Note: While we strive for accuracy in every file, occasional errors can happen. If you notice anything that needs fixing, we kindly ask that you contact us directly instead of leaving a negative review. We’ll be happy to correct it promptly. Thank you for your understanding and support!

Disclaimer: This material is intended solely for educational purposes. The content provided does not promote any beliefs or practices that are inconsistent with Islamic values. All information is shared with the aim of fostering learning and understanding, and I do not endorse or promote anything that contradicts my personal beliefs.

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