Change Over Time X-word

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Across
  1. 2. Name of molten rock when it has reached the surface of the earth
  2. 4. Relative dating principle that says rocks are older the farther down they are
  3. 6. The placing of small rocks or sediment at the bottoms of oceans and lakes
  4. 8. Name of the era in which the number of animal species "exploded"
  5. 9. In addition to heat the other component that helps form Metamorphic rock.
  6. 14. Atomic particle that moves around the nucleus that determines how the element reacts with other atoms
  7. 16. Geologic feature in the ocean where two tectonic plates diverge
  8. 18. Term used to describe a radioactive element changing into a stable one
  9. 21. What an element is called if it emits (throws out) nuclear particles
  10. 24. Major rock type formed by the solidification of molten (melted) rock
  11. 26. Geologic feature that occurs where two continental plates converge
  12. 28. Atomic particle in nucleus that determines what if it is an isotope (stable) or not
  13. 32. Geologic feature that occurs where one ocean tectonic plate converges into a continental one
  14. 33. _______ horizontality says that sediment layers are formed nearly horizontal
  15. 34. What the layers in Sedimentary rocks look like compared to metamorphic.
  16. 35. The squeezing of rocks underground by the layers of rocks above them
  17. 38. Sharp break in layers that is younger than the layers it cuts through
  18. 39. Center of an atom where the Protons and Neutrons reside
  19. 40. Name of the eon in which the Earth first had life, started creating oxygen, and started having continents
  20. 45. The amount of time it takes half the radioactive atoms in a sample to decay into stable ones
  21. 46. Visible in Igneous Extrusive rocks. Makes them jagged. From gas escaping.
  22. 47. The wearing away of a rock by the elements
  23. 48. Atomic particle in nucleus that determines what element it is
  24. 50. Visible in Igneous Intrusive rocks. Gives them their speckled appearance.
  25. 51. An imprint or dead body of an ancient living organism
Down
  1. 1. An element that has already decayed into a stable form
  2. 3. Dating method that gives an actual approximate time
  3. 5. The transportation of small rocks by wind and water
  4. 7. When tectonic plates smashed into each other
  5. 10. Rocks formed from the accumulation of smaller rocks squeezed together layer by layer
  6. 11. The joining of sediment by mineralization "chemical glue"
  7. 12. A radioactive isotope before it has decayed into a stable element
  8. 13. Dating method that only indicates what event occurred before or after another event
  9. 15. Name of the eon in which the Earth was created and was a hot molten mess
  10. 17. Igneous sub type of rock formed by Magma solidifying below the surface of the earth slowly
  11. 19. Geologic feature that occurs in the ocean where two tectonic plates converge
  12. 20. Plate _________. Theory that the continents move because the molten layer they rest on circulates on convection currents and drags them with it
  13. 22. Relative dating principle that says whatever crosses through layers is younger then the layers it crosses through
  14. 23. Igneous sub type of rock formed by Lava solidifying on the surface of the earth quickly
  15. 24. Relative dating principle that says that whatever rocks are trapped in solidified magma/lava is older than the magma/lava that trapped it
  16. 25. Name of the gas that protects Earth from the sun's radiation
  17. 27. Technical term for "forming wavy ribbon-like layers"
  18. 29. An atom with more excess (too many) Neutrons and is unstable
  19. 30. Name of molten rock when it is under the surface of the earth
  20. 31. What the layers in Metamorphic rocks look like compared to sedimentary.
  21. 36. Name of the eon in which the Earth first had multicellular life and its first supercontinent
  22. 37. Rocks formed deep underground by heat and pressure
  23. 41. ________ drift. Theory that the continents of the Earth moved around
  24. 42. When tectonic plates are ripped apart
  25. 43. When tectonic plates dragged past each other
  26. 44. Geologic feature that occurs where two tectonic plates on land diverge
  27. 49. Formed by dead animals exposed to immense heat and pressure for hundreds of millions of years
  28. 50. Formed by dead plants exposed to immense heat and pressure for hundreds of millions of years