How is the Earth's Surface Changing?

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Across
  1. 6. The _________ ridge is an underwater mountain chain where new ocean floor is formed.
  2. 7. hot fluid or semifluid material below or within the earth's crust from which lava and other igneous rock is formed on cooling.
  3. 8. A fact or event which can be observed and/or documented.
  4. 9. Evidence; information gathered from observations.
  5. 11. __________ drift is the hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations.
  6. 12. Alfred _________ A German scientist who proposed the theory of continental drift.
  7. 14. The action or process of observing something or someone carefully or in order to gain information.
  8. 15. The measurement of ocean depths and the charting of the shape or topography of the ocean floor.
  9. 18. relating to earthquakes or other vibrations of the earth and its crust.
  10. 19. A large, ancient landmass that was composed of all the continents joined together.
  11. 20. The data that is used to support a claim.
  12. 21. Volcanic __________ includes any of the many processes (such as eruptions and lava flows) in which gas, lava, and ash are pushed out on the surface of Earth.
  13. 23. the shape of landforms in an area. Usually shows elevation changes.
  14. 24. An ocean _______ is a deep valley in the ocean floor that forms along a subduction zone.
Down
  1. 1. A _________ boundary is a plate boundary where two plates move away from each other.
  2. 2. a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have erupted from the earth's crust.
  3. 3. ________ currents are circular currents in the mantle caused by the magma being heated by the core off the Earth.
  4. 4. Plate __________ is the theory that Earth's outer shell is divided into large slabs of solid rock, called “plates,” that glide over Earth's mantle.
  5. 5. A _________ zone is a region where oceanic plates sink down into the asthenosphere.
  6. 6. the layer of the earth between the crust and the core.
  7. 10. A _________ boundary is a plate boundary where two plates move toward each other.
  8. 13. a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.
  9. 16. A representation of an object or event
  10. 17. Seismic __________ essentially provides an x-ray of the inside of a volcano.
  11. 19. A truth, a rule, or a law
  12. 22. Seafloor __________ is the process that creates new seafloor as plates move away from each other at the mid-ocean ridges.
  13. 23. A _________ boundary is a plate boundary where two plates move past each other in opposite directions.