Tic Tac Know

3. Cause the plates to move; between the lithosphere and the asthenosphere
11. Theory that pieces of the Earth's lithosphere are in motion,driven by convection currents in the mantle
13. A deep canyon on the ocean floor
15. A plate boundary where two plates grind against each other, moving it different directions

1. A plate boundary where two plates move away from each other
2. The undersea mountain mountain chain where new ocean floor is produced; a divergent plate boundary
4. The process by which molten material adds new oceanic crust to the ocean floor
5. Alfred Wegener's hypothesis that the continents were once one huge land mass but have since then drifted apart
6. A break or crack in the Earth's lithosphere along which rocks move
7. A plate boundary where two plates move toward each other
8. Dense ball of solid material at the center of the Earth
9. Thickest layer of the Earth; it Consists of two layers - the lithosphere and the asthenosphere
10. A deep valley where two plates move apart
12. name of a landmass that broke apart 225 million years ago
14. A layer of molten iron and nickel that surrounds the inner core of the Earth