Unit 1 Earth's Formation

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Across
  1. 3. determines the age of the rock in years through chemistry
  2. 5. the phase of matter the material in the inner core is in
  3. 6. accretion begins
  4. 9. infinitely dense and infinitely hot
  5. 11. matter and energy are “locked” in the form they are
  6. 12. studying these helped reveal the layers and characteristics of the interior of the Earth
  7. 14. type of plate boundary where the plates move past each other
  8. 15. measures the amount of time in years it takes a group of atoms that have not decayed yet to decay
  9. 16. dark energy takes over
  10. 19. the process that moves continents across the surface of the Earth due to the convection of the material in the mantle
  11. 20. type of plate boundary where the plates move away from each other
Down
  1. 1. the process the Sun undergoes to produce energy in its core
  2. 2. an important discovery that helped determine the numerical ages of rocks and minerals
  3. 4. the heaviest element a star can create in their core
  4. 7. type of bonding where electrons are shared between two nonmetal atoms
  5. 8. type of bonding where electrons are moved from a metal atom to a nonmetal atom
  6. 10. type of plate boundary where the plates move toward each other and collide
  7. 13. in a tiny fraction of a second, space expanded rapidly due to annihilation
  8. 15. internal energy that is stored and produced in the Earth
  9. 17. determines the age of the rock by comparing it to another thing or event.
  10. 18. a unit of distance that measures how far light travels in one year