Directions: Imagine that you could use a powerful microscope to observe each of the
following objects and materials. The
microscope allows you to see evidence of
cellular structure. Sort each of the objects and
materials into two categories: Not made up of
cells (never made up of cells) OR Made up of cells (or was once made up of cells).

After sorting each of the objects, explain your
thinking. In your explanation, describe any
rules, or factors you used to decide whether
something was made up of cells or not. Include thoughts of your group members as
well, even if you disagree with their approach.