This activity is designed for students to discover the three types of rocks through inquiry.
1) Students choose a rock from a box (enough for all students and includes all three types).
2) Students describe their rock in detail
3) Students peer edit the descriptions
4) Students trade papers and their partner must find their rock based on their description.
5) Rocks are distributed to each group by one type at a time.
6) Students work together to define each type of rock.