Across
- 4. – A dinosaur lived on Earth millions of years ago.
- 5. – During the Precambrian, Earth had very little life and no animals.
- 7. – The Cenozoic era is when mammals became the most common animals.
- 8. – Pangaea’s land slowly broke apart into the continents we know today.
- 11. – Many sea animals appeared during the Paleozoic era.
- 12. – The Cretaceous period ended with a major extinction event.
Down
- 1. – The extinction of dinosaurs changed life on Earth forever.
- 2. – Pangaea was a supercontinent made of all the land on Earth.
- 3. – Ferns were some of the first plants to grow on land.
- 6. – The Mesozoic era is known as the age of dinosaurs.
- 9. – Continental drift explains how continents move over time.
- 10. – Humans appeared during the Quaternary period.