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#21-Mafic

#21-Mafic. Definition: Igneous rocks that contain dark colored minerals. #22-Magnitude. Definition: A measure of the size of an earthquake based on the amount of ground motion experienced: specified on the Richter scale . #23-Mantle.

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#21-Mafic

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  1. #21-Mafic Definition: Igneous rocks that contain dark colored minerals.

  2. #22-Magnitude • Definition: A measure of the size of an earthquake based on the amount of ground motion experienced: specified on the Richter scale

  3. #23-Mantle • Definition: the portion of the earth, about 1800 miles thick, between the crust and the core.

  4. #24-METAMORPHISM • Definition: The alteration of the texture, composition and minerals of a rock by exposure to heat, pressure or chemical actions.

  5. #25-MINERAL • Definition: A naturally occurring, inorganic solid with a definite composition and ordered internal structure.

  6. #26-MOH’S HARDNESS SCALE • Definition: A comparison scale used during mineral identification.

  7. #27-Normal Fault Line • Definition: A break in rock caused by tension forces, where rock above the fault surface moves down.

  8. #28-Oblique slip fault line • Definition: A fault that breaks along a vertical and horizontal angle.

  9. #29-pangea • Definition: The large, ancient landmass that was composed of all the continents joined together.

  10. #30-primary seismic wave • Definition: Seismic waves that move rock particles back and forth in the same direction the wave travels.

  11. #31-reverse fault • Definition: A break in rock caused by compressive forces, where rock above the fault surface moves upward.

  12. #32-rock cycle • Definition: The model that describes how rocks slowly change from one form to another through time.

  13. #33-Sea Floor Spreading Definition: Hess’s theory that new seafloor is formed when magma is forced upward toward the surface at a mid-ocean ridge.

  14. #34-Sedimentary Rock Definition: Rock that forms from sediments that are compacted and cemented together.

  15. #35-Surface Wave Definition: A seismic wave that moves rock particles up and down in a backward rolling motion and side to side in a swaying motion.

  16. #36-S-Wave Definition: A type of seismic wave in which rock particles vibrate at right angles to the direction of wave travel. Secondary waves cause the rocks they pass through to change in shape.

  17. #37-Transform Fault Definition: A type of strike-slip fault that accommodates the relative horizontal slip between tectonic plates, and is common along the edges of plates in mid-ocean ridge regions

  18. #38-Tsunami Definition: A seismic sea wave that begins over an earthquake focus and can be highly destructive when it crashes on shore.

  19. #39-Trench Definition: A long, narrow, steep-sided depression in the seafloor formed where one crustal plate sinks beneath another.

  20. #40-Volcano Definition: An opening in the Earth’s surface that erupts sulfurous gases, ash, and lava.

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