Across
- 2. a line on a diagram or map connecting points relating to the same time or equal time
- 4. is the process that takes place at convergent boundaries by which one tectonic plate moves under another tectonic plate and sinks into the mantle as the plates converge.
- 5. is an actively deforming region where two (or more) tectonic plates or fragments of the lithosphere move toward one another and collide.
- 7. s the portion of motion of a tectonic plate that can be accounted for by its subduction.
- 8. is the study of the record of the Earth's magnetic field in rocks, sediment, or archeological materials.
- 9. also known as conservative plate boundary since these faults neither create nor destroy lithosphere, is a type of fault whose relative motion is predominantly horizontal in either sinistral or dextral direction. Furthermore, transform faults end abruptly and are connected on both ends to other faults, ridges, or subduction zones.
- 11. is the movement of the Earth's continents relative to each other, thus appearing to "drift" across the ocean bed.
- 12. are measurement instruments used for two general purposes: to measure the magnetization of a magnetic material like a ferromagnet, or to measure the strength and, in some cases, the direction of the magnetic field at a point in space.
- 13. valley of mountain ranges
- 14. or sliding plate force is a proposed mechanism for plate motion in plate tectonics. Because mid-ocean ridges lie at a higher elevation than the rest of the ocean floor, gravity causes the ridge to push on the lithosphere that lies farther from the ridge.
- 15. is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.
Down
- 1. or divergent plate boundary (also known as a constructive boundary or an extensional boundary) is a linear feature that exists between two tectonic plates that are moving away from each other.
- 3. As scientists learned more about sea-floor spreading and magnetic reversals, they formed a theory to explain how continents move.
- 6. all the continents connected together
- 10. is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.