NCES.3.P.2 - Understand the structure and properties of matter before and after they undergo a change.
- NCES.3.P.2.1 - Recognize that air is a substance that surrounds us, takes up space and has mass.
- NCES.3.P.2.2 - Compare solids, liquids, and gases based on their basic properties.
- NCES.3.P.2.3 - Summarize changes that occur to the observable properties of materials when different degrees of heat are applied to them, such as melting ice or ice cream, boiling water or an egg, or freezing water.