Earth and space

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Across
  1. 2. the name for someone who study's fossils
  2. 3. appearance of flowering plants
  3. 6. the name for multiple periods of time
  4. 9. the name for buildup of sediment
  5. 11. large flaming ball in space
  6. 12. the item that gets fossilized
  7. 14. period in which amphibians first appeared
  8. 15. the finished product of Petrification
  9. 16. the adjustment to living conditions
Down
  1. 1. the discharge of magma becoming lava
  2. 4. another word for the same type of animal
  3. 5. a period in which marine life first appeared (vertebrates) (fish)
  4. 7. term used for 100% of a species going extinct
  5. 8. what happens when you look at medusa
  6. 10. appearance of first dinosaurs
  7. 13. multiplication of reptile species