Learners will compare the growth rate and appearance of crystals forming on small rocks to those growing on miscellaneous objects. Learners will also investigate how temperature (warm vs. cool room) affects crystal growth. Learners will record their observations at the start and then again after 3 hours, 1 day, and 2 days. This resource includes discussion questions to elicit reflection and help learners draw conclusions. Use this activity to introduce learners to the basics of mineral science as well as the scientific process.