Naming the Dinosaurs: teacher key

Dinosaurs, grade 6 edition, written for 6th grade. Dinosaurs belong to a group of reptiles that includes crocodiles. See how fossils and a made-up word taught us about them, and how the age of dinosaurs ended.

Read the book. Print this page for the key.

Questions and answers

1. Which group of reptiles do dinosaurs belong to?
   • Iguanas
   • Archosaurs (answer)
   • Plesiosaurs
2. Where were the first Iguanodon fossils found?
   • Mongolia
   • Mexico
   • Southern England (answer)
3. Iguanodon teeth were found in 1822. Owen made up Dinosauria in the early 1840s. Which happened first?
   • The Iguanodon find (answer)
   • Owen made up the word
   • They happened together
4. Why are the sizes of the biggest dinosaurs estimates?
   • They never grew
   • Owen guessed
   • The fossils are very incomplete (answer)
5. What does sprawl mean in 'lizards and crocodiles, which sprawl'?
   • Stand straight up
   • Spread out wide (answer)
   • Swim fast

Words

• archosaurs: reptile group
• sprawl: spread wide
• fossils: ancient remains
• estimates: good guesses