UNIT 5 PLATE TECTONICS

1. The portion of motion of a tectonic plate that can be accounted for by its subduction.
4. Sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
6. A type of fault whose relative motion is predominantly horizontal, in either a sinistral or dextral direction.
9. An actively deforming region where two (or more) tectonic plates or fragments of the lithosphere move toward one another and collide.
10. The movement caused within a fluid by the tendency of hotter and therefore less dense material to rise.
13. A change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.
14. A theory explaining the structure of the earth's crust from the interaction of rigid lithospheric plates.
16. Theory that explained how continents shift position on Earth's surface.

2. The rigid outer part of the earth, consisting of the crust and upper mantle.
3. A linear feature that exists between two tectonic plates that are moving away from each other.
5. Formation of new areas of oceanic crust, occurs at mid-ocean ridges.
7. When the hot and neutral connections at a receptacle are wired “backwards.”
8. The movement, formation, or re-formation of continents described by the theory of plate tectonics.
11. A hypothetical super-continent that included all the landmasses of the earth before the Triassic Period.
12. Where the magnetic north points (roughly) towards the geographic north pole.
15. Sliding plate force is a proposed mechanism for plate motion in plate tectonics.