Introduction to the principal chemical constituents and processes occurring in soils and sediments. The objective of the course is to provide students with a conceptual framework for understanding chemical reactions in heterogeneous natural systems. Applications to biogeochemistry and environmental quality will be presented, but fundamental principles will be emphasized. A general chemistry text is a useful additional reference, and it should be consulted for questions regarding concepts that may not be fully reviewed in lecture or the required text. Graduate-level requirements include a term paper that involves independent literature research in a course-related subject of the student's choice.