En anglais

The three periods of the dinosaur age

Science · Dinosaurs & Paleontology · ages 7-9

Name ______________________ Date ____________

Which period ended the Mesozoic Era, when non-bird dinosaurs died out?
- Triassic
- Jurassic
- Cretaceous
Which Mesozoic period came first?
- Triassic
- Jurassic
- Cretaceous
Each Mesozoic period lasted only one year.
Circle one: True False
T. rex lived near the end of which Mesozoic period?
- Triassic
- Jurassic
- Cretaceous
Stegosaurus, with its bony back plates, lived during which period?
- Triassic
- Jurassic
- Cretaceous
Look at the sequence. Which period belongs in the blank spot?
- Jurassic
- Triassic
- Cretaceous
This sequence shows the periods as Cretaceous, Triassic, Jurassic. Is that the correct order they actually happened in?
Circle one: True False
Mia says Stegosaurus and T. rex shared a forest. Which statement explains why they could not have met?
- They shared a forest during the Cretaceous period.
- Stegosaurus lived tens of millions of years earlier.
- T. rex lived tens of millions of years before Stegosaurus.

Answer key

For grown-ups. Fold this page away before handing over the rest.

Cretaceous · The Cretaceous was the last Mesozoic period. Non-bird dinosaurs died out at its end, but some birds survived.
Triassic · The Triassic period was the very first of the three.
False · Each Mesozoic period lasted millions of years, so none lasted only one year.
Cretaceous · T. rex lived near the end of the Cretaceous period.
Jurassic · Stegosaurus lived in the Jurassic period.
Jurassic · Jurassic comes between Triassic and Cretaceous.
False · The real order is Triassic, then Jurassic, then Cretaceous. This list has them scrambled.
Stegosaurus lived tens of millions of years earlier. · Stegosaurus died out tens of millions of years before T. rex appeared. Their lifetimes did not overlap.