Chemical and Physical Properties

If somebody asks, “What are Physical and Chemical Properties?”  You might say, “that is when something new is made.” No, that is a Chemical Change, or Reaction. They are two very different changes.

Physical Properties are traits that involves a thing BY ITSELF. Chemical Properties are properties that involve how things interact with another thing. Everything (matter) has properties. Take water, for example. Its physical properties are that it is colorless, has no smell, and that it is liquid at room temperature. Its chemical property is that it’s made up of hydrogen & oxygen. When you mix hydrogen and oxygen, you get water. It is a chemical change because it makes something new. It isn’t a physical change because it makes something new. Physical Changes just alter something.

But how do you recognize chemical changes? Water is easy to tell because it is a liquid, and it came from two gases! We recognize them by clues such as gas bubbles or color changes. Lets use the bread-making process. Before you bake bread, the dough is a pale tan color. But when you bring it out from the oven, it is a nice brown color. A physical change is when you don’t make something new, so if you make something new, then you have made a chemical change. That is how you can tell between physical and chemical changes.