Types of Dinosaurs

Tyrannosaurus Rex (theropod)

• Walked on two legs
• Kept itself balanced with its huge head and long & heavy tail
• Could weigh up to 7 tons!
• Had small arms that were extremely powerful and featured two clawed fingers
• Lived in the late Cretaceous Period, around 66 million years ago

Velociraptor (theropod)

• Lived in the late Cretaceous Period
• Could weight up to 33 pounds
• Was around the size of a Turkey
• First known fossil was found in the Mongolian Gobi Desert in 1922

Apatosaurus, also known as a Brontosaurus (sauropod)

• Lived in the Jurassic Period, around 150 million years ago
• One of the largest animals to have ever walked on Earth. Could weigh over 23 metric tons and be 75 feet long!
• Had long whip-like tails that counter balanced their long necks
• Was a herbivore (plant eating)

Brachiosaurus (sauropod)

• Walked on all four legs
• Lived in North America. First fossils were found in the Colorado River of  the United States in 1900.
• Herbivores: Ate between 440 and 880 pounds of plants every day!

Triceratops (cerapod)

• Had three horns to protect itself from the Tyrannosaurus Rex which lived during the same time period
• Herbivore
• Lived in the Cretaceous Period (around 65 million years ago)
• Had anywhere between 400 and 800 teeth!

Carnivores vs. Herbivores vs. Omnivores

Herbivores

• Plant eating animals
  • Leaves
  • Twigs
  • Seeds

• Had flat teeth designed for snipping or stripping vegetation

Carnivores

• Eating meat of other animals
  • Fellow dinosaurs
  • Lizards
  • Insects
  • Early mammals

• Had long, sharp, and serrated teeth designed for tearing tough meat

Omnivores

• Eat both plants and meat of other animals
  • Leaves, twigs, seeds
  • Fellow dinosaurs, lizards, insects, early mammals

• Had flat and saw like teeth