Molecules act differently based on whether they are a solid, liquid, or gas. It’s really interesting to see how they change!

1. Solids:

   • In solids, molecules are packed tightly together.
   • They vibrate a little bit but don’t move around much. This gives solids a clear shape and size.
   • Think about ice: it’s hard and stays in one shape.

2. Liquids:

   • In liquids, molecules are close but can slide past each other easily.
   • This lets liquids take the shape of whatever container they are in while keeping the same amount.
   • For example, water flows but the amount stays the same.

3. Gases:

   • In gases, molecules are spaced far apart and can move around quickly.
   • They spread out to fill the entire container and do not have a fixed shape or size.
   • Imagine the air in a balloon: it takes the shape of the balloon, whether it’s big or small.

So, whether we're talking about ice, water, or steam, the way molecules behave makes the world around us really fascinating!