This short workbook is 10 pages about the rock cycle, properties of rocks, and observing rocks. You will have to have some basic understanding of rocks or a text to go with it, but this is a great resource to use as a team grade or exercise.
I like to offer it as an option for kids who don't want to do a leaf or bug collection. Many of the collections we do are in life science, and the demos/labs we do are often in physical science, so this is a fun earth science activity.
Great KAGAN exercise