Reading the Age of Dinosaurs: teacher key

Dinosaurs, grade 4 edition, written for 4th grade. Dinosaurs stood with their legs straight and came in many shapes. Read about the Mesozoic Era, meat-eaters, horns and spikes, and the clues fossils give.

Read the book. Print this page for the key.

Questions and answers

1. How many sharp teeth did T. rex have?
   • About 6
   • About 60 (answer)
   • About 600
2. What was the age of the dinosaurs called?
   • The Mesozoic Era (answer)
   • The Ice Age
   • The Stone Age
3. How did dinosaurs stand?
   • With legs sprawled out
   • With legs straight under their bodies (answer)
   • On their back legs only
4. What does sprawl mean in this book?
   • Stand up straight
   • Spread out sideways (answer)
   • Run very fast
5. What does defended mean in this book?
   • Kept safe (answer)
   • Ran away
   • Ate plants
6. A Triceratops had three horns. How many horns did two Triceratops have?
   • Three
   • Nine
   • Six (answer)

Words

• sprawl: spread out sideways
• periods: spans of time
• defended: kept safe
• asteroid: space rock