Geography - Physical Geography - Earth's structure - crust, mantle, core - Journey to the Center of Earth

A visual journey from Earth's surface to its center. Step 1: 'Crust' - Thin outer layer (5-70 km thick). We live here! Made of solid rock. Two types: oceanic (thin, dense) and continental (thick, lighter). Step 2: 'Upper Mantle' - Solid but can flow slowly over millions of years. Contains the asthen