unit 3 vocab

3. top-most layer of the Earth, composed of both the crust and the portion of the upper mantle that behaves as a brittle, rigid solid.
6. the stress that causes plates to be pushed towards each other
7. a long, narrow, deep depression on the ocean floor
8. Canyon a deeply eroded area in the continental slope carved out by ancient rivers and/or turbidity currents
11. the stress that causes plates to be pulled away from each other
12. Boundary created when plates slide past each other
13. Ridge a long underwater mountain chain, produced by seafloor spreading at divergent plate boundaries
14. Slope the steep decline from the continental shelf to the ocean floor
17. the solid upper layer of the Earth's mantle, that is so hot that it behaves plastically and can flow. Convection currents occur here and move the lithospheric plates above.
18. Margin the edge of the continent, comprised of the continental shelf, slope, and rise
20. a seamount whose top has been eroded flat by wave action, and then subsides
21. Plain a flat area on the ocean floor, covered by a thick layer of fine sediment, making them the flattest places on Earth.
22. an underwater mountain, usually volcanic

1. Boundary created when plates move towards each other
2. the stress that causes plates to slide past each other
4. Rise a mound of sediments at the base of the continental slope
5. Boundary created when plates move away from each other
9. Shelf the gently sloping part of the continent that is underwater
10. currents a heat transfer process of flowing fluid that is moving because there is a temperature or density difference within the material.
15. Current an underwater mudslide of sediments
16. Valley an undersea valley, located along the center of the mid-ocean ridge, from which lava seeps out and creates new ocean floor.
19. ring-shaped coral reef, encircling a shallow lagoon