Jayda

4. a line on an isotope ratio diagram denoting a suite of rock or mineral samples all formed at the same time.
6. states that Earth's lithosphere is broken into many pieces—tectonic plates—that move slowly over the asthenosphere.
8. a linear feature that exists between two tectonic plates that are moving away from each other.
9. the hypothetical landmass that existed when all continents were joined
10. 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.
11. a process that occurs at mid-ocean ridges
12. a strike-slip fault that offsets a mid-ocean ridge in opposing directions on either side of an axis of seafloor spreading.
15. the portion of motion of a tectonic plate that can be accounted for by its subduction.

1. the study of the magnetic record in rocks.
2. 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.
3. a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.
5. a destructive plate boundary.
7. the movement of the Earth's continents.
13. 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.
14. a sliding plate force is a proposed mechanism for plate motion in plate tectonics.