What Is Plate Tectonics?

Earth is covered in moving plates. These large plates make up the outer layer of Earth's surface and sit on top of another layer made up of molten rock. You may not usually feel it, but these plates are always moving! Borders between plates often build up a lot of pressure, resulting in earthquakes and volcanoes. The plates can slide against each other, crash into each other, move apart, and even create mountains. This engaging book will show readers there's so much to learn about what's going on beneath Earth's surface.