Answers 1. “Terrible lizard” 2. Tyrannosaurus rex 3. Cretaceous Period 4. Scientists believe they could be both 5. Triceratops 6. Brachiosaurus or Sauropod 7. Mesozoic Era 8. True 9. A massive asteroid impact 10. Ankylosaurus 11. Stegosaurus 12. None — fossils have been found on every continent 13. Carnivore 14. Spinosaurus 15. Preserved remains of ancient life in rock 16. Sedimentary rock 17. Hadrosaur (“duck-billed dinosaur”) 18. Ornithomimus or Dromiceiomimus 19. Three 20. Pachycephalosaurus 21. Spinosaurus 22. Megalosaurus (1824) 23. Microraptor 24. Early reptiles/Archosaurs 25. Theropods 26. Pterosaurs 27. Nigersaurus 28. Iguanodon 29. Diplodocus 30. Microraptor or the tiny bird-like dinosaurs 31. Oviraptor 32. Velociraptor 33. Stegosaurus 34. Tyrannosaurus rex 35. Herbivore 36. Fossils show they lived in warm climates before Antarctica froze 37. Therizinosaurus 38. Sauroposeidon or Brachiosaurus 39. About 165 million years 40. Archaeopteryx 41. Argentinosaurus 42. Parasaurolophus 43. Protoceratops 44. Hadrosaurs 45. Maiasaura 46. Brachiosaurus 47. Chicxulub Crater 48. Hadrosaurs 49. 5.5 feet wide (found in Australia) 50. Deinonychus or Allosaurus (trackways suggest pack behavior)