Table of Contents
Plate tectonics is a scientific theory that explains the movement of Earth’s lithospheric plates. These movements shape the planet’s surface and influence geological activity. Understanding these facts helps to grasp how Earth’s surface is constantly changing.
Basic Principles of Plate Tectonics
Earth’s outer shell is divided into several large and small plates that float on the semi-fluid asthenosphere beneath them. These plates move at a rate of a few centimeters per year, similar to the rate of fingernail growth.
Types of Plate Boundaries
There are three main types of plate boundaries:
- Convergent boundaries where plates collide
- Divergent boundaries where plates move apart
- Transform boundaries where plates slide past each other
Effects on Earth’s Surface
Plate movements cause various geological phenomena, including earthquakes, volcanic eruptions, mountain formation, and ocean trench development. These processes continuously reshape continents and ocean basins.