The document summarizes key concepts about plate tectonics and the structure of the Earth. It describes the three main layers of the Earth - the crust, mantle, and core. It then explains key terms like plate tectonics, sea-floor spreading, continental drift, and the three types of plate boundaries: divergent where plates pull apart, convergent where they push together, and transform where they slide past each other.

1. Ch. 3- Plate Tectonics

2. Layers of the Earth 1.

3. A. _____- (5 to 35 km) continental and oceanic; made up of stiff crust and upper mantle (_________) crust lithosphere

5. B. ______ (_____________)- plastic or taffy-like substance under the crust mantle asthenosphere

6. C. _____- outer core: _______, composed of iron and nickel; inner core: _____, iron and nickel core liquid solid

8. C. __________- transfer of heat due to movement of ____ caused by _________ differences. (Ex. furnace) convection air temperature

10. radiation conduction convection

11. 3. ____________- how much volume (thickness) a substance has density

12. 4. _________ ______- heating, rising, cooling and sinking convection current

13. 5. ________________- the hypothesis that states that land masses were once ___ __________ but have since separated and moved apart continental drift one continent

14. 6. ________- all Earth in one super continent Pangaea

15. 7. ___________-any trace of an ancient organism that is found in rock fossil

16. 8. _______________- the area of the ocean floor that is pulling apart; ________; wher e new crust is being formed Sea-floor spreading rift zone

17. 9. _______- pieces of the Earth’s crust and upper mantle plates

19. 10. _______________- crustal movement and changes plate tectonics

21. 11. ___________- upper crustal blocks and upper hard mantle 12. ____________- upper plastic-like part of the mantle lithosphere asthenosphere

24. 13. Plate boundaries where plates meet

25. A. _________- where plates are pulling apart; force- ________ B. __________- where plates move toward one another overlapping; force- ___________ divergent tension convergent compression

26. C. _________- where plates move side by side in opposite directions or in the same direction at different speeds; force- __________ transform shearing

27. 14. _____________-area where one plate descends under another subduction zone