Unit 3

5. the process by which plate tectonics produces new oceanic lithosphere at ocean ridges
8. When oceanic crust collides with a continent
10. boundaries where the rigid plates are moving apart
12. boundary where two plates slide past each other
14. the oceanic lithosphere sliding down the oceanic ridge under the pull of gravity
15. a hypothesis that originally proposed that the continents had once been joined from a single supercontinent that broke into pieces and drifted into their present-day positions

1. the transfer of heat by the movement of a mass or substance
2. the study of changes in Earth's magnetic field, as shown by patterns of magnetism in rocks that have formed over time
3. boundary describes a collision between two plates composed of oceanic lithosphere
4. boundaries where two plates move together
6. describes the collision of two tectonic plates composed of continental lithosphere
7. the theory that proposes that Earth's outer shell consists of individual plates that interact in various ways and thereby produce earthquakes, volcanoes, mountains, and the crust itself
9. the remains or traces of an organism preserved from the geologic past
11. cool dense oceanic crust sinks into the mantle and pulls the trailing lithosphere along
13. massive slab of solid rock made up of Earth's lithosphere (crust and upper mantle)