Across
- 2. tectonic plate boundary where plates come together.
- 3. a long, narrow ditch at the bottom of the ocean.
- 4. vertical movement of currents caused by temperature difference in a fluid such as air.
- 5. a high-energy wave caused by an earthquake, volcano, landslide or other natural event that displaces and distributes energy through the ocean waters.
- 6. a sudden violent shake of the ground, a result of movements within the earth's crust.
- 8. a deep rift valley formed by the divergent boundary, extending the length of the Mid- Ocean Ridge and the site of frequent volcanic activity.
- 10. tectonic plate boundary where plates move away from each other.
- 11. formation of new areas of oceanic crust
- 13. tectonic process where one plate is pulled beneath the other.
Down
- 1. where two plates either come together, move away or slide past each other.
- 2. the theory of ______________ is that Earth's continents were once joined together and have since drifted apart.
- 7. interaction causes continental drift, earthquakes, volcanoes, mountains and oceanic trenches.
- 9. tectonic plate boundary where plates slide past each other.
- 12. The theory of ____________ is that Earth's lithosphere is divided into plates that move.