States of Matter Diagram
Free printable states of matter diagram — a labeled illustration showing how the particles are arranged in a solid, a liquid and a gas. Download a high-resolution PDF or PNG for Letter paper.
The three states of matter
Matter is anything that takes up space, and it usually exists in three states: solid, liquid and gas. Here is what happens at each labeled part of the diagram:
| State | What it does | Why it matters |
|---|---|---|
| Solid | The particles are packed tightly in a fixed pattern, so a solid keeps its own shape. | Because its particles lock into a fixed pattern, a solid holds its shape without a container — which is why your chair doesn't puddle on the floor when you sit on it. If solids couldn't maintain their structure, nothing we build or touch would stay in one piece. |
| Liquid | The particles are close but can slide past each other, so a liquid flows and takes the shape of its container. | The sliding, flowing behavior of liquid particles is exactly what lets blood carry oxygen through your veins and lets rivers carve canyons over thousands of years. Take away liquids, and there would be no way to transport nutrients, dissolve chemicals, or fill any container we pour into. |
| Gas | The particles are far apart and move freely, so a gas spreads out to fill any space. | Freely moving gas particles spread out to fill every corner of a space, which is why the oxygen you breathe reaches every part of your lungs — not just the spot right in front of your mouth. Without gases behaving this way, Earth's atmosphere couldn't wrap evenly around the planet and protect us from space. |
Companion worksheet
A free fill-in worksheet with an answer key, built from the labels above — students match each state to its description, then answer a couple of short questions. Great for a quick check after using the diagram.
How to print
Choose Download PDF for a ready-to-print file that fits US Letter paper (8.5 × 11") in landscape, or Download PNG for the high-resolution image.
Frequently asked questions
What are the three states of matter?
The three common states of matter are solid, liquid and gas.
Why does a solid keep its shape but a gas does not?
In a solid the particles are locked tightly together, so it holds its shape. In a gas the particles are far apart and move freely, so the gas spreads out to fill whatever space it is in.
What paper size should I print this on?
The diagram is sized for standard US Letter paper (8.5 × 11") in landscape orientation. Use "Download PDF" for a print-ready file that fits the page automatically.