First Grade
Worksheets
Meet Chasmosaurus
Chasmosaurus (KAZ-moe-sore-uss) was not a large dinosaur. It was about as big as a rhinoceros. It walked on four thick legs. Each foot had four short toes.
It had a huge neck frill. There were small, sharp bones on the sides of the frill.
The frill was not made of solid bone. There were large gaps inside the bony edges of the frill. The gaps were filled with muscle.
