9 Dinosaur timeline

DINOSAUR TIMELINE The time when dinosaurs dominated the Earth is called the Mesozoic Era. It lasted for over 180 million years. This era is divided into three time periods called the Triassic, Jurassic, and Cretaceous. During these periods, the climate changed and different plants and animals appeared. TRIASSIC PERIOD Most of the Earth was hot and dry. There weren't many plants and the land was a desert. Small dinosaurs and tiny mammals began to appear for the first time.

JURASSIC PERIOD The Earth became much wetter. Forests and lush vegetation grew, providing food for enormous plant-eating dinosaurs. Dragonflies and the first birds also appeared. CRETACEOUS PERIOD The temperature dropped, creating a warm, wet climate. Dinosaurs were the most powerful creatures on Earth- but at the end of the Cretaceous, many of them became extinct. 200-145 million years ago