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Journey Through Time
10 Questions
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Journey Through Time

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@FinestAzurite

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Questions and Answers

Approximately how long ago did Earth form?

  • 4.1 to 4.28 Ga
  • 1 trillion years ago
  • 3.7 Ga
  • 4.5 billion years ago (correct)

    • When did evidence suggest that life emerged on Earth?

  • 4.1 to 4.28 Ga
  • 3.7 Ga (correct)
  • 1 trillion years ago
  • 4.5 billion years ago

    • How many species have been identified on Earth?

  • 1 trillion
  • 1.75–1.8 million (correct)
  • 4.5 billion
  • 1.8 million

    • What percentage of currently living species represent all species that have ever lived on Earth?

    <p>Less than one percent</p> Signup and view all the answers

    What is the earliest evidence of life based on?

    <p>Biogenic carbon signatures and stromatolite</p> Signup and view all the answers

    Which of the following is true about the emergence of life on Earth?

    <p>Life emerged after 3.7 Ga</p> Signup and view all the answers

    What is the estimated number of species that may exist on Earth?

    <p>1 trillion</p> Signup and view all the answers

    What percentage of all species that have ever lived on Earth are currently living?

    <p>Less than one percent</p> Signup and view all the answers

    What is the approximate age of Earth?

    <p>4.5 billion years</p> Signup and view all the answers

    What is the earliest evidence of life based on?

    <p>Biogenic carbon signatures and stromatolite</p> Signup and view all the answers

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