Schrocks with Rock!

3. 80-200km; just below the crust
7. in an undisturbed sequence of sedimentary or volcanic rock layers, the oldest layers are found at the bottom, and the youngest layers are at the top
9. made hypothesis of seafloor spreading
12. Proposed the hypothesis of Continental Drift
14. The scientific theory that Earth's continents move across the planet's surface over geologic time
15. a geologic process at mid-ocean ridges where new oceanic crust forms from rising magma, pushing older crust away and expanding the ocean floor
17. liquid core
18. Largest layer of the Earth
20. the plate tectonic process by which Earth's continents repeatedly merge into a single massive landmass and then break apart again over hundreds of millions of years

1. a type of tectonic plate boundary where two plates slide horizontally past each other, parallel to the fault line
2. the scientific theory that Earth's outer shell, the lithosphere, is broken into several large and small plates that slowly move and interact, shaping Earth's surface features and causing geological events like earthquakes and volcanoes
4. Long word that starts with the letter P.
5. a geological area where two or more lithospheric plates move toward and collide with each other
6. the layer that we live on and most studied
8. Is much hotter and has ability to flow
10. area of volcanic activity when magma rises in a plume; can only be used to measure plate movement
11. a tectonic plate boundary where two plates move away from each other, creating new crust as magma rises from the Earth's mantle to fill the gap
13. an underwater mountain range formed by the divergent movement of Earth's tectonic plates, where magma rises from the mantle to create new oceanic crust.
16. a geological process where tectonic plates stretch and pull apart, thinning the Earth's crust and leading to the formation of rift valleys and eventually new ocean basins
19. solid core center of the Earth