NCES.4.P.2 - Understand the composition and properties of matter before and after they undergo a change or interaction.
- NCES.4.P.2.1 - Compare the physical properties of samples of matter: (strength, hardness, flexibility, ability to conduct heat, ability to conduct electricity, ability to be attracted by magnets, reactions to water and fire).
- NCES.4.P.2.2 - Explain how minerals are identified using tests for the physical properties of hardness, color, luster, cleavage and streak.
- NCES.4.P.2.3 - Classify rocks as metamorphic, igneous, or sedimentary based on their composition, how they are formed and the processes that create them.