Across
- 1. is the portion of motion of a tectonic plate that can be accounted for by its subduction.
- 4. is the study of the record of the Earth's magnetic field in rocks, sediment, or archaeological materials.
- 6. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
- 7. a line on a diagram or map connecting points relating to the same time or equal times.
- 10. known as a destructive plate boundary (because of subduction), is an actively deforming region where two (or more) tectonic plates or fragments of the lithosphere move toward one another and collide.
- 12. A change in the Earth's magnetic field resulting in the magnetic north being aligned with the geographic south, and the magnetic south being aligned with the geographic north
- 14. is the movement of the Earth's continents relative to each other, thus appearing to "drift" across the ocean bed.
Down
- 1. process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.
- 2. Places where plates slide past each other
- 3. outer rigid layer of the earth (the lithosphere) is divided into a couple of dozen "plates" that move around across the earth's surface relative to each other, like slabs of ice on a lake.
- 5. an instrument used for measuring magnetic forces, especially the earth's magnetism.
- 8. a large elongated depression with steep walls formed by the downward displacement of a block of the earth's surface between nearly parallel faults or fault systems.
- 9. was a supercontinent that existed during the late Paleozoic and early Mesozoic eras.
- 11. 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.
- 13. sliding plate force is a proposed mechanism for plate motion in plate tectonics.