This episode defines energy and the different energy resources. Topics covered in this video: 0:00 - 0:26: Introduction 0:27 - 4:46 (end) - Definition of energy - Different kinds of energy - Energy transformations - Efficiency - Energy resources are found in all spheres of the earth (geosphere, biosphere, hydrosphere, atmosphere, cosmosphere) Created by Prof. Richard Sedlock at San Jose State University.