Bill Nye Dinosaurs Worksheet 1. Of all the millions of dinosaurs that must’ve once lived, we only know about a _________. 2. We know about them because we found their fossil ______________. 3. To become a fossil, first the plant or animal has to _____________. Then is has to get buried, usually by _________________ 4. This is a piece of a __________________ from a Maiasaur. 5. We don’t just dig up bones, we have found their ______________. 6. The first clue that dinosaurs existed at one point is their bones buried in ___________. 7. Scientists can learn lots about _____________ by looking at how they were buried, how deep they are and what is __________ them. 8. Most scientists believe ________________ from space killed the dinosaurs. 9. With enough ________________thrown into the atmosphere, it would block the _______ from the _________. 10. Dinosaurs and humans ________ lived at the same time. 11. ____________ are a lot like dinosaurs. 12. You can learn a lot about how something moved from its __________________. 13. We can measure the amount of radioactive Potassium and ___________ in the dinosaur fossils. 14. __________________ can become a paleontologist. 15. One reason to study dinosaurs is because they lived on their own _______________. 16. The Earth began about ________________ years ago. 17. The dinosaurs went extinct about __________________ years ago.