The Three Periods of the Dinosaur Age

Science · Dinosaurs & Paleontology · ages 7-9

Name ______________________ Date ____________

Which period came last, right before the dinosaurs disappeared?
- Triassic
- Jurassic
- Cretaceous
Which period came first?
- Triassic
- Jurassic
- Cretaceous
All dinosaurs lived at the exact same time.
Circle one: True False
Tyrannosaurus rex, one of the last dinosaurs, lived during which 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
- Ice Age
- Stone Age
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 were friends who lived together. What is wrong with what Mia said?
- Nothing, Mia is correct
- Stegosaurus actually lived tens of millions of years before T. rex, so they never met
- T. rex lived before Stegosaurus, not after

Answer key

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

Cretaceous · The Cretaceous period was the last of the three.
Triassic · The Triassic period was the very first of the three.
False · Dinosaurs lived across three different periods, spanning many millions of years. They did not all live together.
Cretaceous · T. rex lived near the very end of the Cretaceous period.
Jurassic · Stegosaurus is a Jurassic dinosaur, known for the rows of plates on its back.
Jurassic · Jurassic sits in the middle, between Triassic and Cretaceous.
False · The real order is Triassic, then Jurassic, then Cretaceous. This list has them scrambled.
Stegosaurus actually lived tens of millions of years before T. rex, so they never met · Stegosaurus belongs to the Jurassic period. T. rex belongs to the Cretaceous, tens of millions of years later. They never crossed paths.