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2. 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.
3. a linear-shaped lowland between several highlands or mountain ranges created by the action of a geologic rift or fualt.
5. sliding plate force is a proposed mechanism for plate motion in plate tectonics.
6. occurs at mid ocean ridges, where new oceanic crust is formed through volcanic activity and the gradually moves away from the ridge.
8. theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core.
9. 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.
11. is a linear feature that exists between two tectonic plates that are moving away from each other.
12. magnetic polarization acquired by the minerals in a rock at the time the rock was deposited or solidified.

1. the lateral movement of continents resulting from the motion of crustal plates.
4. an actively deforming region where two plates or fragments move toward one another and collide.
6. portion of motion of a tectonic plate that can be accounted for by its subduction.
7. a line on a isotope ratio diagram denoting a suite of rock or mineral samples all formed at the same time.
8. places where plates slide sideways past each other.
10. a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.
12. was a supercontinent that existed during the late Paleozoic and early Mesozoic eras.