Dinosaurs lived long ago in prehistoric times. Prehistoric means before anyone lived to write down information about what was happening. All dinosaurs lived in prehistoric times. But not all dinosaurs lived during the same period.

  • Stegosaurus
  • Sabertooth Cat
  • Tyrannosaurus Rex
  • Triceratops

Diet: Leaves and plants
Home: Forests and swamps
Size: As long as a school bus
Special Feature: Bony plates on its back
Means of Protection: Sharp tail spikes

Diet: Other animals
Home: Grasslands and forests
Size: About the size of a lion
Special Feature: Two long, sharp teeth
Means of Protection: Sharp teeth and running speed

Diet: Other animals alive or dead
Home: western North America
Size: Tall as an elephant
Special Feature: Long tail for balance
Means of Protection: Big, sharp teeth and sharp claws

Diet: Green plants
Home: North American plains
Size: About as long as a school bus
Special Feature: Three horns and a large
neck frill
Means of Protection: Two long horns above its eyes