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What is a geological era, and how does it contribute to our understanding of Earth’s history? Explain.

Topic: Salient features of world’s physical geography.

3. What is a geological era, and how does it contribute to our understanding of Earth’s history? Explain. (250 words)

Difficulty level: Tough

Reference: The Hindu

Why the question: 

Our planet is more than four billion years old – a staggering amount of time for humans to contemplate. To ease this task, experts have divided earth’s history into pieces of time, called aeons, eras, periods, and epochs.

Key Demand of the question:

To provide an explanation of geological eras, their significance in the study of geology, and their role in understanding Earth’s history and the evolution of life.

Directive word: 

Explain – Clarify the topic by giving a detailed account as to how and why it occurred, or what is the context. You must be defining key terms wherever appropriate and substantiate with relevant associated facts.

Structure of the answer:

Introduction: 

Define geological eras and their relevance in the field of geology.

Body:

Write about how geological eras provide a framework for organizing and studying Earth’s history, allowing scientists to comprehend the progression of geological events over billions of years. Describe how geological eras contribute to our understanding of major geological events like continental drift, mountain-building, and mass extinctions etc.

Conclusion:

Conclude by summarising.