What Is a Rock?

This module introduces students to materials that make up Earth's crust: rocks, soil, and fossils. Students begin by examining rock and mineral samples. They observe that rocks are made up of combinations of minerals, and that minerals can be identiļ¬ed by properties, including color, texture, and hardness.

Student Resources

Learn by Reading

For additional content-area reading, check out the Houghton Mifflin Science eBook: Grade 2, Unit C, pages 8–9, C6, L1–3.