Earth History Worksheet
Explore the geological timescale, major eras, and significant events in Earth's history with this comprehensive worksheet for Grade 9 science students.
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Earth History Worksheet
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Read each question carefully and provide your best answer. Use the provided image of the geological timeline to assist you with some questions.
1. Which eon represents the earliest part of Earth's history, from its formation until approximately 4.0 billion years ago?
Proterozoic Eon
Archean Eon
Hadean Eon
Phanerozoic Eon
2. The Mesozoic Era is known as the 'Age of '.
Mammals
Fishes
Reptiles
Amphibians
3. The Great Oxygenation Event occurred during the Eon, leading to a significant increase in atmospheric oxygen.
4. The extinction event that wiped out the dinosaurs occurred at the end of the Period.
5. Briefly describe the concept of uniformitarianism in geology.
6. Explain the significance of banded iron formations as evidence of early Earth history.
7. The Cenozoic Era is characterized by the diversification of mammals.
True
False
8. The Cambrian Explosion refers to a rapid increase in the diversity of marine life during the Cambrian Period.
True
False
Match each geological term with its description.
9. Absolute Dating
a. Determines the exact age of a rock or fossil.
10. Relative Dating
b. Determines the order of events without knowing exact ages.
11. Index Fossil
c. A fossil used to define and identify geologic periods.