This document provides an overview of key concepts about Earth's surface and topography. It discusses the four spheres that make up Earth (atmosphere, hydrosphere, biosphere, lithosphere). It then describes topography and the three factors that determine it: elevation, relief, and landforms. It outlines the three main types of landforms - plains, mountains, and plateaus - and provides examples of each in the United States. Finally, it instructs students to label and shade a map of US landforms.