Students take a closer look at matter and the particles that make it up. First, they model atoms on paper, including the particles that make up atoms. Then they interpret the chemical formulas of different compounds. Finally, they build three-dimensional models of different molecules.

Student Resources

• 2.1 Vocabulary
• 2.2 Elements and Their Atoms
• 2.3 Identifying Atoms
• 2.4 Chemical Formulas
• 2.5 Modeling Molecules
• 2.6 Section 2 Assessment

Learn by Reading

For additional content-area reading, check out the Houghton Mifflin Science eBook: Grade 5, Unit E, pages 6–10 and 26–27.