Geological Time Scale Exploration
An engaging worksheet for Grade 9 Science students to explore the Geological Time Scale, major eras, periods, and significant events in Earth's history.
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Standards
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Geological Time Scale Exploration
Name:
Date:
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Read each question carefully and answer to the best of your knowledge. Refer to your notes or textbook if needed.
1. The largest divisions of geological time are called .
2. The Mesozoic Era is known as the Age of .
3. The first forms of life appeared during the Eon.
4. The extinction event that wiped out the dinosaurs occurred at the end of the Period.
1. Which of the following is the correct order of geological time units from largest to smallest?
Era, Eon, Period, Epoch
Eon, Era, Period, Epoch
Period, Epoch, Era, Eon
Epoch, Period, Era, Eon
2. Approximately how long ago did Earth form?
4.6 million years ago
4.6 billion years ago
460 million years ago
46 billion years ago
1. The Cenozoic Era is the current geological era.
True
False
2. Fossils are primarily found in igneous rocks.
True
False
1. What is the significance of mass extinction events in the geological time scale?
2. Explain how radiometric dating helps scientists determine the age of rocks and fossils.
Match the geological era with a significant event or characteristic:
1. Paleozoic Era
a. Age of Mammals
2. Mesozoic Era
b. First abundant marine life; appearance of vertebrates
3. Cenozoic Era
c. Age of Reptiles (Dinosaurs)
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