Mesozoic Era

The Mesozoic Era is a geological era that spans from approximately 252 to 66 million years ago. It is often referred to as the "Age of Dinosaurs" due to the dominance of these reptiles during this time period. The Mesozoic Era is divided into three major periods: the Triassic, Jurassic, and Cretaceous periods.

Triassic Period

The Triassic Period occurred from about 252 to 201 million years ago. During this time, the first dinosaurs and mammals appeared. The supercontinent Pangaea also began to break apart, leading to the formation of separate landmasses.

Jurassic Period

The Jurassic Period lasted from approximately 201 to 145 million years ago. This period is known for the dominance of dinosaurs such as the Brachiosaurus and Stegosaurus. It was also a time of diversification for plant and animal life.

Cretaceous Period

The Cretaceous Period occurred from about 145 to 66 million years ago. This period saw the rise of the Tyrannosaurus rex and Triceratops, as well as the evolution of flowering plants. The Cretaceous Period ended with a mass extinction event that wiped out the dinosaurs and many other species.

Study Tips

• Memorize the key events and major species that existed during each period.
• Understand the concept of continental drift and how it influenced the geography and climate of the Mesozoic Era.
• Learn about the mass extinction event that marked the end of the Mesozoic Era and its potential causes.
• Use visual aids such as timelines, maps, and diagrams to help you understand the geological and biological changes that occurred during this era.
• Review key vocabulary terms related to the Mesozoic Era, such as Pangaea, dinosaurs, and mass extinction.

[Mesozoic] Related Worksheets and Study Guides:

• Geologic timeScience • Eighth Grade