Plate Tectonics Theory
Across
- 3. The name given to the supercontinent that existed about 200 million years ago before it began to break apart
- 4. A boundary where two tectonic plates move toward each other, often resulting in subduction and the formation of mountain ranges or volcanic arcs
- 5. A boundary where two tectonic plates slide past each other horizontally, often resulting in earthquakes
- 7. A boundary where two tectonic plates move apart, often leading to the formation of a mid-ocean ridge and seafloor spreading
- 8. The hypothesis that the continents were once joined together in a single supercontinent and have since moved apart
- 9. The layer of Earth beneath the crust, made up of hot, dense rock
Down
- 1. The process by which new oceanic crust is created at mid-ocean ridges as two tectonic plates move apart
- 2. A long, continuous underwater mountain range that runs through the center of most ocean basins
- 3. The theory that Earth's outer shell is divided into several plates that move and interact with each other
- 6. The process by which one tectonic plate is forced under another and into the mantle