The Rock Cycle, Weathering, Erosion, and Geologic Time
Earth’s surface is always changing, though usually too slowly to notice. Rocks form, break down, move, and re-form in a never-ending loop, and the same processes have shaped the planet over billions of years. Understanding the rock cycle, weathering, erosion, and geologic time ties earth science together. This lesson covers how rocks change and how […]
Minerals and Their Identification
Rocks are made of minerals, and geologists identify minerals the way a detective identifies a suspect: by a set of clear, testable properties. Learning how to identify a mineral by its traits is a practical earth science skill that appears often on tests. This lesson covers what minerals are and the properties used to identify […]
