Techtonic Plates
Across
- 1. There are __________ volcanoes in the ring of fire.
- 6. the physical study of the earth and its atmosphere.
- 7. The earths surface is cracked into large pieces called _______.
- 9. who came up with the theory of the continental drift?
- 13. The outermost shell of a terrestrial planet.
- 15. Distribution of similar ____________ across the continents suggest they were once connected.
- 18. At one time all the continents were together this was a supercontinent called ________________.
- 19. Earthquakes and volcanoes happen on the ________ of the plates.
- 20. Most tectonic plates are made up of contenant and _______.
Down
- 2. maps Plate lines are visible on ________ maps.
- 3. Evidence that all the continents were once one super continent is because they fit together like a __________.
- 4. Sudden movements of the earth's crust on the fault line.
- 5. The idea of continental drift was developed in _________.
- 8. A new theory of plate tectonics was developed over _______years ago.
- 10. Movements of tectonic plates cause _________________ and volcanoes.
- 11. The theory of the continental drift is believed that the continents are __________.
- 12. Fractures on rock surfaces that can be seen on a map
- 14. Continents can drift by moving slowly on a layer of liquid ________.
- 16. A permanent layer of ice covering an extensive area of land.
- 17. 90% of all earthquakes happen in the ______________________________.