* Particles in motion: Gas molecules are constantly moving and colliding with each other and the walls of their container.
* No fixed shape: Because of this constant motion, gas particles are not bound together in a fixed arrangement like solids or liquids.
* Filling the available space: This means that gas molecules spread out to fill the entire volume of their container, taking on its shape.
Think about it:
* You can fill a balloon with helium, and it will expand to the shape of the balloon.
* If you put air into a square box, it will take the shape of the box.
Let me know if you have more questions about gases!
