Earth and space

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