Discover the differences between ecosystems across Earth and how small changes can have a big impact. Engaging activities introduce students to physical and geological scientific concepts through a series of 12 lessons. Discover how density, heat transfer, food chain dynamics, plate tectonics, and the water cycle affect aquatic life. A teacher guide includes step-by-step instructions on how to perform experiments and student worksheets for easy analysis. 250+ piece kit includes baking soda, salt, clay, colored pencils, markers, dice, food coloring, pipettes, plastic tubs, and much more to simulate various ecosystems. Includes storage tote. Full contents list below. Recommended for Upper Elementary and up.