Skip to main content

Loading...

Learning for every age, in 20 languages.

Platform

Explore Learning
Platform Features
Pricing & Plans
Free Essay Grader
All Modules
Learning Games
Science Lab

Programs

Exam & SAT Prep
Homeschool Engine
Schools & Institutions
Merch & Ecosystem Store
10:1 Scholarship Program
Investor Relations
Partner & Influencer Portal

Company

Our Mission
Learning Blog
Press & Media
Help & Support
Create Account
Data & Account Deletion

Legal

Privacy Policy
Terms of Service
Refund Policy
Do Not Sell My Info
Delete Account

© 2026 Koydo, Inc. · Free education for every mind.

COPPA Compliant·FERPA Safe·Zero Ads·Made with ❤️ for learners everywhere·

🌊

States of Matter

Is it a solid, liquid, or gas? Explore the three states of matter with everyday examples! Freeze water into ice, melt chocolate, and watch steam rise as you sort, drag, and simulate how matter changes form.

Choose an Adventure Step

📚5 Lessons🎯Science

⭐Suggested lesson

Recommended now: New Step. This is a fresh lesson in your learning path.

🧩1Solids — Strong and Steady. interactive. 8 minutes.

▶Start lesson

🧩2Liquids — Splashy and Flowing. interactive. 8 minutes.

▶Start lesson

🧩3Gases — Invisible and Free. interactive. 8 minutes.

▶Start lesson

🧩4Matter Can Change!. interactive. 8 minutes.

▶Start lesson

✅5States of Matter Quiz. quiz. 6 minutes.

▶Start lesson