EXPLORING PLATE TECTONICS

2. layer between the crust and the core
5. the type of stress that occurs when forces act to stretch an object
8. A boundary of two tectonic plates where the plates move away from each other.
10. a break in the Earth's crust along which two blocks of the crust slide relative to one another
14. Slowly moving pieces of Earth’s crust.
16. caused by warm fluids rising and cooler fluids sinking.
18. credited with the theory of Continental Drift
20. This is the layer we walk on.

1. scientist who studies earthquakes.
3. boundary of two tectonic plates where the plates slide past each other.
4. hypothesis that the continents slowly move across Earth's surface
6. boundary of two tectonic plates where the plates move towards each other.
7. zone region where an oceanic plate sinks down into the asthenosphere
9. the outermost, rigid layer of the Earth that consists of the crust and the rigid upper part of the mantle
11. two tectonic plates slowly crash into each other and form mountains
12. the result of a force distributed over an area
13. soft layer of the mantle
15. the name given to the super continent
17. any trace of an ancient organism that has been preserved in rock
19. vibration from underground movement along a fault plane