Matter is anything that has mass and volume. Examples of matter include a Hello Kitty toy and a window shelf. Light is an example of something that is not matter since it has no mass or volume. A pure substance has a fixed chemical composition, such as water. An element is made of only one type of atom, like silver. A compound is made of two or more different types of atoms bonded together, such as orange juice. A mixture maintains the original properties of its substances and can be either homogeneous, like corn syrup, or heterogeneous, like oil and juice.