The scientific skill of defining operationally is the process by which a scientific term is framed in terms of a student's own experiences. An operational definition is also used to define what you will do and what you will observe when conducting and investigation. In this lesson, students practice defining a rock based on all they know about rocks. Then they compare their definition with ones from science books and dictionaries and write a new definition. Afterwards, there is a writing activity using the word rock in many sayings. This is a rich language development lesson tied to science. Teacher instructions, scoring rubric, recording page, and a writing page are included in this lesson packet.
This lesson is in the green book Rising to the Challenge of the National Science Education Standards, also sold on this website. This is lesson seven of nine process skill lessons on rocks that will also be available for purchase as a bundle.