Extending from the top of the vegetation canopy through the groundwater table, the critical zone supports nearly all terrestrial life on Earth. EarthÂ¿s critical zone provides us with clean air, drinkable water, fertile soil and much more. However, human activity has changed the structure and function of the critical zone by altering its constituent parts: the atmosphere, lithosphere, hydrosphere and biosphere. Therefore, educating future generations about the critical zone is of utmost importance. This teaching practicum course applies basic science education principles and the fundamentals of critical zone science towards teaching K-12 students in hands-on Earth Science Discovery workshops at the Flandrau Science Center & Planetarium. Enrollment Requirements: ENVS 270.