A T-Rex used its jaws to attack its prey. A T-Rex has small arms and it has sharp claws on it too.
A Triceratops is a three horned, plant-eating dinosaur. A Triceratops grew a huge head it is 7 feet (2 meters) long.
A Stegosaurus has two rows of hard, red, spiky, plates. A Stegosaurus can attack its prey by swinging it's spiky tail.
An Apatosaurus's group is a huge, long-necked, long-tailed dinosaur named sauropods. An Apatosaurus used to live 150 million years ago.
A Torosaurus is one kind of dinosaur that has one of the largest heads. A Torosaurus is really like a Triceratops, and Torosaurus has more color.