An introduction to how our planet works, focusing on physical processes that govern the nature and composition of Earth with an emphasis on the dynamic nature of the planet. Topics include surface processes (e.g., weathering and erosion, ocean and atmospheric circulation, weather and climate), crustal processes (e.g., plate tectonics, earthquakes, volcanoes, biogeochemical cycles), and earth-environment interactions (e.g., natural hazards, resource development, and sustainability).