Unit 2 Vocabulary Crossword

5. faster wave from an earthquake, can travel through any medium
6. When two plates move towards each other and collide; creates subduction zones, earthquakes, and mountains
9. thicker, older, less dense part of the lithosphere
11. cycling of the asthenosphere, with warm materials rising and cool materials sinking. Responsible for continental drift
17. change in the orientation of Earth's magnetic field where magnetic north and magnetic south switch
18. term for the super continent which contained all the continental plates together
22. The soft layer of the mantle on which the lithosphere floats.
24. 1) continental fit, 2) similarity of plant and animal fossils 3) similarity of rock sequences
25. underwater mountain ranges formed by seafloor spreading at divergent plate boundaries, where new crust is formed

1. The process where dense oceanic crust sinks beneath less dense continental crust at a convergent plate boundary; creates trenches
2. A theory stating that the earth's surface is broken into plates that move.
3. Molten rock beneath the earth's surface
4. Ocean crust is younger than continental, symmetrical pattern of magnetic polarity reversals recorded by rocks, mid-ocean ridge
7. densest, hottest layer of the earth
8. the interior of the earth is organized based on…
10. slower wave from an earthquake, can only travel through solids
12. thinner, younger, denser part of the lithosphere
13. Molten rock that reaches the surface
14. the rigid outer part of the earth
15. scientist who came up with the continental drift theory
16. measures the waves created by an earthquake
19. The hypothesis that the continents slowly move across Earth's surface.
20. when two plates move away from each other, exposing the magma of the mantle. Creates midocean ridges
21. When two plates slide against each other; causes earthquakes
23. an area of lithosphere over a mantle plume. Creates volcanic activity