Matter & Energy Lab makes states of matter something you can heat and cool.

Drag the temperature and watch particles freeze, melt, and boil — solid, liquid, gas — right in your browser.

What you get

Physics clicks when you control the energy and watch matter respond.

Who it is for

Curious learners, STEM families, and teachers who want to see how matter changes state.

Try it for real

What you can play and explore right now.

The particles respond to the exact temperature you set — it is not a recorded video.

Cross the melting or boiling point and the state of matter changes right away.

Plays right on this page, no sign-in needed.