You know that matter is the stuff that all things are made of. Matter makes up our bodies. It makes up our food and our homes. Matter makes up the air that we breathe. It even makes up the stars in the sky. Matter makes up every substance, but what is matter made of? Matter is made up of tiny particles called atoms. Atoms are called the building blocks of matter. This is because atoms can be put together to build anything. There are more than one hundred kinds of atoms. You can use wood, bricks, and steel to build a building. These are the building blocks. There are many kinds .....