Second graders are learning about physical changes to matter. Matter can change size, shape, or form, and these changes are known as physical changes. We can change the shape of clay by molding it differently. We can cut paper into funky sized pieces! We can even use a saw and chop down a tree. All of these are examples of physical changes, where matter changed size, shape, or form. Our melting snowmen showed an example of physical change, too, changing from a solid to a liquid.