Approximately how old is the Earth?

Study for the SACE Stage 2 Biology Exam. Enhance your understanding with quizzes, interactive flashcards, and detailed explanations. Be fully prepared for your exam success!

The Earth is approximately 4.5 billion years old, which aligns with scientific estimates based on various methods, including radiometric dating of the oldest rocks and moon samples. This age has been confirmed through studies of meteorites, which are believed to have formed around the same time as the solar system. The age of approximately 4.5 billion years points to the period of the Earth's formation from the primordial accretion of material in the early solar system, which involved the coalescence of dust and gas around the young Sun. This timeframe is critical in understanding Earth's history, as it marks the beginning of geological processes and the eventual emergence of life.

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