Earth's Past

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Across
  1. 2. they analyze the planet's composition, structure, processes and history, such as rock formations
  2. 5. fossils of this plant was found in South America, Africa, India, Australia, and Antarctic, served as proof of a moving Earth.
  3. 7. super continent, evidence of Earth's past
  4. 11. this hypothesis, a drift, suggest that the Earth is constantly in motion and spreading apart.
  5. 12. protects Earth's surface from the Sun's radiation
  6. 13. scratches made by glaciers at this location served as proof that the continents were moving. It's too warm.
Down
  1. 1. scratches made by glaciers
  2. 3. explanation for a phenomenon
  3. 4. a mountain range found in Eastern North America
  4. 6. is the principle that in undisturbed rock layers, the oldest rocks are at the bottom
  5. 8. sinking of the ocean crust below the surface where it is recycled back into the Earth's mantle
  6. 9. He explained his observations by matching the maps where certain rocks were found on different continents.
  7. 10. along with rocks serve as a type of evidence that the Earth is always changing