Anything you see and can feel is made of atoms. All atoms are too small to be seen with the naked eye or even a microscope, although there are some new types of microscopes that are now able to see larger atoms such as gold. All matter is the same because all matter is made up of atoms. Matter is also different because objects can be made up of different kinds of atoms. Gold is made of one kind of atom-gold atoms.
Salt is made up of two different kinds of atoms-sodium atoms and chloride atoms.
Properties of Matter Remember all objects take up space and have mass. You use your sense of taste and smell to tell the difference between spinach and an orange. The measurement of mass and other characteristics that can be seen without changing how that object looks are its physical properties. When you look at oranges, you know that they are oranges because of their color, shape, and smell. Mass, color, shape, volume, and density are some physical properties.