This middle school unit is a great introduction to matter. It has been used successfully in my classroom. All student printouts, worksheets, and tests, are formatted in Microsoft Word so they are editable to best fit your class's needs. Answer keys are included. See the preview for the full unit plan.
•MS-PS1-1 Develop models to describe the atomic composition of simple molecules and extended structures.
Science and Engineering Practice(s):
•Developing and using models.
•Planning and carrying out investigations
•Obtaining, evaluating and communicating information
•Scale, Proportion, and Quantity
•Structure and Function