Earth's History Crossword

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Across
  1. 3. Fossil, fossils used to determine relative age of a rock
  2. 7. when molten rocks cool and harden a ________ rock formed
  3. 9. a guess or conclusion based on observations and prior knowledge
  4. 10. the coming together of two pieces of land
  5. 12. a rock that has small sand pieces and a gritty texture
  6. 15. it's another word for crust
  7. 16. the moving away of two plates
Down
  1. 1. current, the fluid movement that causes plates to move is called ________
  2. 2. Remains, trace, or imprints of an organism that has been preserved in the Earth's crust
  3. 4. this igneous rock cools above the Earth's surface
  4. 5. the mass land of all the continents is called _________
  5. 6. the San Andreas fault is an example of a ________ fault
  6. 8. the biggest layer of the Earth
  7. 11. information gathered by using one or more of the five senses
  8. 13. age, the number of years since a rock formed
  9. 14. the wear down of Earth's surface in to a sediment
  10. 17. this igneous rock forms underground
  11. 18. Age, the age of a rock compared to the age of other rocks