Dynamic Earth - station 3

1. Below the lithosphere is a layer of upper mantle called the asthenosphere. This is made up rock that is fluid and can move. It is this fluidity that powers the movement of the tectonic plates of the Earth's crust.
6. A mid-ocean ridge is an underwater mountain system formed by plate tectonics. It consists of various mountains linked in chains, typically having a valley known ...
7. In plate tectonics, a divergent boundary 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.
8. Dip-slip faults can occur either as "reverse" or as "normal" faults. A normal fault occurs when the crust is extended. Alternatively such a fault can be called an extensional fault. The hanging wall moves downward, relative to the footwall.
9. the transfer of heat by the mass movement of heated particles into an area of cooler fluid.
10. a map showing the relief features of the earth's surface, usu. by means of contour lines to show changes in elevation;

2. There are three kinds of plate tectonic boundaries: divergent, convergent, and transform plate boundaries. This image shows the three main types of plate boundaries: divergent, convergent, and transform.
3. a fault in which the rock above the fault plane is displaced upward relative to the rock below the fault plane (opposed to gravity fault).
4. A seismogram is a record written by a seismograph in response to ground motions produced by an earthquake, explosion, or other ground-motion sources.
5. analysis using the fact that physical quantities added to or equated with each other must be expressed in terms of the same fundamental quantities (such as mass, length, or time) for inferences to be made about the relations between them.