Earth and space

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