science

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Across
  1. 4. /The process by which Earth’s magnetic north pole and magnetic south pole switch positions periodically; a change in the direction in which Earth’s magnetic field points.
  2. 7. /the strong, lower part of the mantle between the asthenosphere and the outer core
  3. 9. / The bending, tilting, and breaking of earth’s crust; the change in the change in the shape of rock in response to stress.
  4. 12. / The boundary between two tectonic plates that are moving away from each other.
  5. 15. /Any movement of matter that results from difference in density; may be vertical, circular, or cyclical.
  6. 19. /The mantle is the compositional layer below the crust, The mantle contains silicate minerals like the crust, but has more dense elements, such as magnesium and iron.
  7. 21. /The process by which one lithospheric plate moves beneath another plate as a result of tectonic forces.
  8. 22. /The central part of earth below the
  9. 23. /The location within Earth along a fault at which the first motion of an earthquake occurs.
Down
  1. 1. /The boundary between tectonic plates that are sliding past each other horizontally
  2. 2. /The sudden return of elastically deformed rock to its undeformed shape
  3. 3. spreading/The process by which new oceanic lithosphere (sea floor) forms when magma rises to Earth’s surface at mid-ocean ridges and solidifies, as older, existing seafloor moves away from the ridges.
  4. 5. /A system of ideas that explains many related observations and is supported by a large body of evidence acquired through scientific investigation.
  5. 6. /The point on earth’s surface directly above an earthquake's starting point or focus.
  6. 8. /The solid, outer layer of earth that consists of the crust and the rigid upper part of the mantle.
  7. 10. /A movement or trembling of the ground that is caused by a sudden release of energy when rocks along a fault move.
  8. 11. /The theory that Earth’s outer layer is made up of large, moving pieces called tectonic plates; the theory explains how plates interact and how those interactions relate to processes such as earthquakes and mountain building.
  9. 13. /A block of lithosphere that consists of the crust and the rigid, outermost part of the mantle
  10. 14. The soft layer of the mantle on which the tectonic plates move.
  11. 16. /The boundary between tectonic plates that are colliding.
  12. 17. /The hypothesis that a single large landmass broke up into smaller land masses to form the continents, which then drifted to their present locations ; the movement of continents.
  13. 18. /The thin and solid outermost layer of Earth above the mantle.
  14. 20. plate boundary / The edge between two or more plates classified as divergent, convergent, or transform by the movement taking place between the plates.