Everything is matter. Your parents are matter and you are matter to.
Matter takes up space which means that has volume and mass .Mass is the weight that an object has and Volume takes its space which is shape.
Matter is made of small parts called atoms. Atoms are the small parts that matter has. If atoms did not exist matter will not exist as well. Atoms are small and every matter has them including us.
Matter can be classified by its properties. It can be classified by its properties like its three states liquid, solid, and gas. Or it could be classified by its look like the, hardness, shape, size and color.
Solids have their own shape. Like a pencil, that is a solid and you can not change its shape only if you broke it or burn it. And they have atoms, they are close together which means that the closer they get the hardest they get.
Liquids do not have their own shape. Like water. that is a liquid because it moves around and you can not pick it up just if you put it in a container. It can take the shape of its container. Liquids do have atoms that flow through each other.
Gas does not have their own shape.Like a balloon that has gas a different type of gas it is called Helium. Atoms in a gas are far apart from each other, the air that we breath is another type of gas.
A solid could change to a liquid. For example, you have ice cream the sun is too hot and it turns to a liquid that is called melting. When something melts it turns to a liquid.
A liquid could change to a solid. For example, if you put water into a container to make ice cubes and you put it into the freezer it will turn into a solid. It’s called freezing. When something freezes it gets hard.
A liquid could change to a gas. For example, if their is a puddle of water it will turn to a gas because maybe the sun is too hot and makes the water evaporate. When liquid evaporates it turns into a gas. If you see a cloud in the sky, it is gas!
Gas could change to a liquid. For example, if you are taking a shower and it is hot it will make gas when that gas goes to the mayor it turns into liquid because the mayor is cold and the gas was hot it is called condensation.