EARTH AND SPACE JIGSAW PUZZLE

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Across
  1. 3. are made up of natural substances called minerals
  2. 5. A earthquake epicenter can be located from records made by earthquake waves on devises
  3. 6. spreading is the hypothesis, proposed in the early 1960s, that new ocean floor is created where two plates move away from one another at mid-ocean ridges.
  4. 10. is the proposed "supercontinent" or large land mass that began to break apart 200 million years ago to form the present continents
  5. 11. is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core
  6. 15. crust is the crust that is under the world's oceans
  7. 17. is the process by which less dense material rises and more dense material sinks. In Earth’s mantle hot rock rises and slightly cooler rock sinks
  8. 19. is a theory that states that continents were once large area of land that broke apart and now slowly moving away from one another.
  9. 20. is the scientist who made the theory on continental drift
  10. 21. wave A seismic wave that travels across the surface of the Earth as opposed to through it. Surface waves usually have larger amplitudes and longer wavelengths than body waves, and they travel more slowly than body waves.
  11. 23. a geologist proposed the hypothesis of seafloor spreading
  12. 24. supports plate tectonic theory
Down
  1. 1. the point within the Earth where the actual movement takes place
  2. 2. The inside layer the most dense, compose of the outer core and the inner core.
  3. 4. The wave record from a seismograph
  4. 5. is the instrument used to mapped the mid-ocean ridges
  5. 7. method used to locate earthquake epicenter center of an earthquake
  6. 8. is the very slow creeping motion of Earth's solid silicate mantle caused by convection currents carrying heat from the interior to the planet's surface.
  7. 9. The Middle layer, more dense than the crust, compose of the upper mantle, the lithosphere, and the lower mantle.
  8. 12. is a continuous mountain chain on the floor of all major ocean basins which marks the site where new ocean floor is created as two lithospheric plates move away from one another
  9. 13. As the older seafloor sinks, the weight of the uplifted ridge pushes the oceanic crust toward the trench at the subduction zone
  10. 14. required number of recording station
  11. 16. crust is that under the continents and other large land masses
  12. 18. the point on the surface directly above the focus
  13. 22. the top layer the least dense layer, compose of continental and oceanic crust.