In solids the molecules are tightly packed together, they keep their shape and size. Liquids have no shape of their own. The molecules in liquids can flow and take on a shape of a container. Gases have no constant shape or size, and the molecules in a gas can float around. We can not see most gases.
We learned that not all solids are the same. Some solids can melt. Some solids float and others sink. Some solids feel smooth and others are rough. Some solids dissolve in a liquid.
We learned that liquids are not all the same either. Liquids can be different colours. Some liquids pour very slowly and are thick because the molecules are closer together. Other liquids pour very fast.
We learned the least about gases because we can not see them. Gases can completely fill any closed container.
We did an experiment where we watched an ice cube change from a solid to a liquid to a gas. We put the ice cube in a pan on the stove and it completely evaporated in about 2 minutes.
We really liked the experiment to see what solids could float. Then we got to make a boat from a solid and get it to float.
We also liked the experiment when we dissolved solids into liquids.
We did experiments on freezing and absorbing too.