The document is an excerpt from a science textbook about landforms, bodies of water, and how the Earth's surface can change. It includes 3 main topics: 1) Earth is made up of land, air, and water. Landforms like hills, valleys, mountains and plains shape the land. 2) Oceans, lakes and rivers hold the water on Earth. 3) Water, wind and ice can change Earth's surface over time through processes like earthquakes. The text also includes vocabulary words, photo credits, and questions to check comprehension.