Mesozoic Era
The Mesozoic Era is a geologic era that spans from approximately 252 to 66 million years ago. It is often referred to as the "Age of Reptiles" due to the dominance of dinosaurs during this time. The Mesozoic Era is divided into three periods: the Triassic, Jurassic, and Cretaceous.
Triassic Period (252-201 million years ago)
The Triassic period was a time of significant evolutionary diversification. Early dinosaurs, mammals, and the first flying vertebrates appeared. The supercontinent Pangaea began to break apart, leading to the formation of separate landmasses.
Jurassic Period (201-145 million years ago)
The Jurassic period is known for the dominance of dinosaurs, including iconic species like the Brachiosaurus and Stegosaurus. It was also a time of diversification for marine life, with the emergence of new marine reptiles and the first true crocodiles.
Cretaceous Period (145-66 million years ago)
The Cretaceous period saw further diversification of dinosaurs, including the evolution of the fearsome Tyrannosaurus rex and the Triceratops. It was also a period of significant evolutionary developments, including the emergence of flowering plants and the spread of new insect species.
Study Guide for Mesozoic Era
- What are the three periods of the Mesozoic Era?
- What is the significance of the Triassic period in the evolutionary history of life on Earth?
- Describe the dominant life forms of the Jurassic period.
- What major developments occurred during the Cretaceous period?
- How did the breakup of Pangaea impact the evolution of life during the Mesozoic Era?
[Mesozoic] Related Worksheets and Study Guides:
.◂Biology Worksheets and Study Guides High School. Evolution and classification
Worksheet/Answer key
Worksheet/Answer key