Physical Sciences Standards Preview Standard Set Physical Sciences Materials come in different forms (states), including solids,liquids,andgases As a basis for understanding this concept: 1.b Students know the properties of substances can change when the substances are mixed, cooled, or heated by Nancy Day Genre Nonfiction Comprehension Skill Put Things in Order Text Feature • Glossary Science Content Matter Scott Foresman Science 1.2 ISBN 0-328-23470-2 ì