Paleozoic Era

The Paleozoic era, also known as the "age of ancient life," spanned from about 541 million years ago to 252 million years ago. It is divided into six geologic periods: the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian.

Key Events and Characteristics

• Diversification of Life: The Paleozoic era saw the emergence and diversification of many major groups of organisms, including fish, amphibians, reptiles, and early land plants.
• Pangaea Formation: During the late Paleozoic, the supercontinent Pangaea began to form as the Earth's landmasses collided and merged together.
• Mass Extinctions: The end of the Paleozoic era was marked by the largest mass extinction event in Earth's history, known as the Permian-Triassic extinction, which wiped out nearly 90% of marine species and 70% of terrestrial vertebrate species.

Study Guide

Here are some key points to remember when studying the Paleozoic era:

1. Identify the six geologic periods of the Paleozoic era in chronological order.
2. Describe the major groups of organisms that emerged and diversified during the Paleozoic era.
3. Explain the significance of Pangaea and its formation during the late Paleozoic.
4. Understand the impact and significance of the Permian-Triassic mass extinction event.

[Paleozoic] Related Worksheets and Study Guides:

• Geologic timeScience • Eighth Grade