Geologic Time Scale Exploration

Geologic Time Scale Exploration

Read each question carefully and answer to the best of your ability. Use complete sentences for short answer questions.

1. Which eon represents the earliest part of Earth's history, characterized by the formation of the Earth and the Moon?

2. The Mesozoic Era is often referred to as the 'Age of Reptiles' due to the dominance of:

3. The Geologic Time Scale is divided into major units called  , which are further subdivided into  , and then into  .

4. The Cambrian Explosion, a period of rapid diversification of life, occurred at the beginning of the   Period.

5. The Cenozoic Era is the current era and is often called the 'Age of Mammals'.

6. The extinction event that wiped out the dinosaurs occurred at the end of the Permian Period.

7. Briefly explain why the Geologic Time Scale is not uniform in its divisions (e.g., some periods are much longer than others).

8. Describe one major biological or geological event that occurred during the Precambrian Eon.

Match each geological period/era with a significant event or characteristic.