Take a cyberjourney back to the Mesozoic Era and learn fascinating facts about the dinosaurs that populated the Earth for many millions of years. Dinosaurs were just one of several kinds of prehistoric reptiles that lived during the Age of Reptiles. The largest dinosaurs, such as the Seismosaurus, were over 100-feet long and up to 50-feet tall. The smallest was no larger than a chicken! Most dinosaurs were somewhere in between. Start with the CyberHunt Reproducible page, found at www.scholastic.com/cyberhuntkids

By Brad Kloza

CYBERHUNT REPRODUCIBLE ANSWER GUIDE
1. Dinosaurs lived on Earth for about 165 million years. They became extinct around 65 million years ago.
2. 2. A fossil—often a bone, a shell, or the imprint of a leaf—is the remains of an animal or plant that lived long ago. Over many years, the bone or other remains harden into rock.
3. Discovered in November 2000, the Saltriosaur was a meat-eating dinosaur, 28-feet long, weighing over a ton.
4. You built a Deinonychus!
5. Argentinosaurus huinculensis was the largest dinosaur; it was between 115- and 130-feet long, and ate plants.
6. Three of the following: Tyrannosaurus, Ankylosaurus, Anatotitan, Torosaurus, Didelphodon, or Quetzalcoatlus.
7. Here are five possible reasons for the extinction of dinosaurs: giant asteroid impact, supernova, orbital changes, volcanic eruption, or disease.
8. 1C, 2A, 3B
9. Answers will vary. Display your students' work on a "Dinosaur Encyclopedia wall" in your classroom!

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