Earth's Formation, Relative & Absolute Dating

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Across
  1. 5. This is the reason the Earth is still HOT today, elements are breaking in half releasing heat. ________ Decay
  2. 6. Which shadow zone is larger?
  3. 8. This is the first reason the Earth is so hot, heat was created from objects colliding together creating what?
  4. 10. When the Earth was molten (liquid), the layers formed based on
  5. 12. What is the state of matter of the inner core?
  6. 15. How can scientists study the layers of the Earth?
  7. 16. Where do dense liquids go?
  8. 17. P and S waves speed up when they travel through this type of material because it is more dense
  9. 19. Magma intrudes into the rock layers creating this
  10. 21. What is the state of matter of the outer core?
  11. 22. The longest block of time in the geological time scale
  12. 23. What happens to temperature, pressure, and density as you move to the core of the Earth?
Down
  1. 1. P waves get ______ at the outer core
  2. 2. This is caused by weathering and erosion, it is shown with a squiggly line in our practice
  3. 3. Why is the inner core solid?
  4. 4. What force is responsible for causing materials that formed the Earth to condense (come together)?
  5. 7. What is the process where dense material (iron & nickel) sank to the center of the Earth when it was forming? Planetary _______.
  6. 9. This law describes rock layers at the bottom are the oldest and the youngest are at the top
  7. 11. Where do less dense liquids go?
  8. 13. A circular area around the surface of Earth where P and S waves are not recorded by seismometers at earth recording stations
  9. 14. S waves get ______ at the outer core because they can not go through liquid
  10. 18. A break in the rocks
  11. 20. What is the most dense layer?
  12. 24. What happens to the speed of P waves as they travel through liquids, which are less dense?