Jurassic Period Page 12
The Jurassic Period is a time when the dinosaurs, birds, and rodents lived. The climate of the period was warm, moist, and had tropical breezes. The continents started to break up. The oceans started to form interior seas. There were a lot of birds, insects, and fish. The Jurassic period lasted 54 million years and ended about 146 million years ago. Dinosaurs are huge reptiles that weighed as much as 80 tons. Climate is the weather system.