K-T boundary

Edit Answers
12345678910
Across
  1. 3. this was the period where the first dinosaurs appered.
  2. 6. higher levels of an element.
  3. 9. this was the cause of dinosaurs deaths.
  4. 10. this era's rocks was compared to the Mesozoic era's rocks.
Down
  1. 1. the first bird appered in this period.
  2. 2. tectonics this describes the movement of several large plates that make up the surface of Earth.
  3. 4. this period was where flowering plants
  4. 5. scientists believe that this was the cause of the mass extinction at the end of the Mesozoic era.
  5. 7. the era where K-T boundary begin.
  6. 8. creatures that were the dominant organisms during the Mesozoic era.