Introduction to Plate Tectonics
What is Plate Tectonics?
Plate tectonics is the scientific theory that explains how Earth's outer shell is divided into several large, rigid pieces called tectonic plates that move slowly over time. This movement causes many of Earth's most dramatic geological features and events, including earthquakes, volcanoes, mountain ranges, and ocean trenches.
Key Fact:
The word "tectonic" comes from the Greek word "tekton," which means "builder." This is fitting because plate tectonics is essentially the theory that explains how Earth's surface features are built and rebuilt over time.
Why is Plate Tectonics Important?
Understanding plate tectonics helps us:
- Predict where earthquakes and volcanic eruptions are most likely to occur
- Understand how mountains, ocean basins, and other landforms were created
- Explain the distribution of fossils and rock types across continents
- Understand why certain resources like oil, minerals, and metals are found in specific locations
- Predict future changes to Earth's surface over millions of years