Geologic Time Scale activity - Free Printable

Educational worksheet: Geologic Time Scale activity. Download and print for classroom or home learning activities.

JPG 372×480 30 KB Free · Personal Use

Quality Assured by Worksheets Library Team

Reviewed for educational accuracy and age-appropriateness

ID: #1635834

✨ Generate New Worksheet

⭐

Show Answer Key & Explanations Step-by-step solution for: Geologic Time Scale activity

▼

1. The geologic time scale is a system of chronological dating that relates geological strata to time, used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth's history.

2. The major unit of geologic time is the eon.

3. The geologic time scale is divided into eons, eras, periods, and epochs.

4. Geologists estimate Earth to be about 4.54 billion years old.

5. Scientists have been able to develop a geologic time scale by studying rock layers (strata) and the fossils they contain, using principles of stratigraphy and radiometric dating.

6. The three eras of the Phanerozoic Eon are the Paleozoic, Mesozoic, and Cenozoic.

7. The organisms and their first appearance in the geologic time are as follows:
- Bacteria: Precambrian
- Seed plants: Paleozoic
- Modern humans: Cenozoic
- Flowering plant: Cenozoic
- Mammal: Mesozoic
- Reptiles: Paleozoic
- Tyrannosaurus rex: Mesozoic
- Fishes: Paleozoic
- Horse: Cenozoic
- Insects: Paleozoic

Parent Tip: Review the logic above to help your child master the concept of geologic time activity worksheet.

Print Download

Geologic Time Scale activity - Free Printable

How to use

Related worksheets: geologic time activity worksheet