Paper Towel Diffusion Lab worksheet. So many times in labs students get so caught up in doing the activity, they aren't sure what the purpose of the lab was...to solve that, this worksheet includes learning targets (also called "I can" statements) so students can visualize their goal for the activity. In addition, it includes a independent and dependent variables and a graphing component to the activity. This is a great scientific method OR diffusion/osmosis lab.
Teacher's note: I like to add food coloring to the cups of water they are dipping their paper towels into for more of a "wow" effect.