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Absolutely Sure. Relatively Sure. Early Earth. This & That. Mysterious Earth. 100. 100. 100. 100. 100. 200. 200. 200. 200. 200. 300. 300. 300. 300. 300. 400. 400. 400. 400. 400. 500. 500. 500. 500. 500. Assigning a date to events or features.

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  1. Absolutely Sure Relatively Sure Early Earth This & That Mysterious Earth 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500 500

  2. Assigning a date to events or features.

  3. What is a absolute age dating?

  4. The process where unstable isotopes break down into stable isotopes of the same or other elements.

  5. What is radioactive decay?

  6. This is an atom that has the same number of protons as other atoms of the same element but that has a different number of neutrons.

  7. What is an isotope?

  8. I have 2,000 grams of Uranium-238. After 2 half-lives how much Uranium-238 do I have and how much Lead-206 do I have?.

  9. What is 500 grams of Uranium-238 and 1,500 grams of Lead-206?

  10. When talking about radioactive decay, the unstable isotopes are referred to as this.

  11. What is the parent?

  12. Putting things in chronological order without actual dates and using geologic principles.

  13. What is relative age dating?

  14. The principle that states the present is the key to the past.

  15. What is the Principle of Uniformitarianism?

  16. An igneous intrusion is always ______ than the layers it cuts through.

  17. What is younger?

  18. A break in the geologic record created when rock layers are eroded or when sediment is not deposited for a long period of time.

  19. What is an unconformity?

  20. The principle that states that younger rocks lie above older rocks if the layers have not been disturbed.

  21. What is the Principle of Superposition?

  22. Scientists think Earth began as this.

  23. What is a ball of dust, rock, & ice?

  24. This is how old scientists believe Earth to be.

  25. What is approximately 4.6 billion years?

  26. The method used to determine how old rocks are.

  27. What is radioactive dating?

  28. The force that pulled the space debris together to form Earth.

  29. What is gravity?

  30. This type of energy was changed to thermal energy as material hit Earth’s surface.

  31. What is kinetic energy?

  32. Radioactive isotope that is used to date bone and wood.

  33. What is Carbon-14?

  34. The layer with the greatest volume.

  35. What is the mantle?

  36. When molten rock from Earth’s interior squeezes into existing rock layers and cools.

  37. What is an intrusion?

  38. Heat transfer with a fluid takes place by

  39. What is convection?

  40. Where the oldest rock was found.

  41. What is Great Slave Lake, Canada?

  42. The layer where convection takes place.

  43. What is the mantle?

  44. It is the layer that is most dense.

  45. What is the inner core?

  46. The “Founder of Geology.”

  47. Who is James Hutton?

  48. This layer includes the crust and upper mantle.

  49. What is the lithosphere?

  50. Scientists think this is created because of convection currents in the outer core.

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