Okay, so imagine everything around you, like the air you breathe and the water you drink, can be in different forms. We call these forms "states of matter." There are three main states of matter: solid, liquid, and gas.
1. Solid: When something is a solid, it means it keeps its shape and doesn't change easily. Think of your toy blocks or a rock. They are solid because they stay in one piece and you can hold them in your hand. Ice is also a solid because it keeps its shape until it melts.
2. Liquid: When something is a liquid, it can flow and take the shape of its container. Imagine a glass of water or your favorite juice. When you pour it into a cup, it takes the shape of the cup. So liquids are like water, juice, and even milk.
3. Gas: When something is a gas, it spreads out and fills the space it's in. Think of how air fills up a balloon or how steam rises from a hot cup of soup. Gases are things like the air we breathe and the fumes that come out of a car.
There are also two other states of matter: plasma and Bose-Einstein condensate, but those are a little trickier to explain. The main idea is that everything around you, like the clothes you wear and the food you eat, is in one of these states of matter - solid, liquid, or gas.