When we heat different types of matter—solids, liquids, and gases—we see how the tiny particles inside them move in different ways. Let's break this down into simple parts:

Solids

• How Particles Move: In solids, the particles are packed really close together. They don’t move around a lot, just shake a bit in their spot.
• What Happens with Heat: When we heat solids, the shaking gets stronger. The particles gain energy and might eventually break apart, turning the solid into a liquid (this is called melting).

Liquids

• How Particles Move: In liquids, the particles are still close together, but they can slide past one another. They have more energy than in solids, which helps them move around more freely.
• What Happens with Heat: When we heat a liquid, the energy of the particles increases, making them move faster. If we heat it enough, the liquid will start to boil and turn into a gas.

Gases

• How Particles Move: In gases, the particles are far apart and can move around freely. They spread out to fill the whole container they are in.
• What Happens with Heat: Heating gases makes the particles move even quicker. This causes them to spread out more, which is why warm air rises!

In short, heating different states of matter changes the way the tiny particles inside move. Whether it's a solid, liquid, or gas, heat makes a big difference in how they act.