The Early Earth: Formation and Conditions Before Life
12 Questions
2 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What was the primary composition of the first atmosphere on Earth?

  • Thick with oxygen and little water vapour
  • Mainly consisted of hydrogen and methane
  • Predominantly composed of nitrogen and its oxides
  • Thick with water vapour, along with various compounds released by volcanic eruptions (correct)
  • What process led to the formation of the ocean on early Earth?

  • Volcanic eruptions releasing water into the atmosphere
  • Water vapour condensing due to cooling of the Earth (correct)
  • Hydrogen escaping into space
  • Water vapour freezing into ice
  • Which of the following factors favoured the synthesis of organic molecules essential for the origin of life?

  • Low levels of UV radiation
  • Abundant oxygen in the atmosphere
  • The reducing atmosphere, volcanic eruptions, and hydrothermal vents (correct)
  • The presence of complex organisms
  • What is the age of the fossils of micro-organisms that provide direct evidence for life on early Earth?

    <p>3.5 billion years old</p> Signup and view all the answers

    What is the term for the process by which simple organic molecules combine to form macromolecules?

    <p>Polymerization</p> Signup and view all the answers

    Who proposed the biochemical evolution theory?

    <p>Oparin and Haldane</p> Signup and view all the answers

    What is the primary mechanism that facilitated the formation of small organic molecules from inorganic molecules on early Earth?

    <p>Atmospheric conditions</p> Signup and view all the answers

    What is the probable location where the first organic compounds and cells may have arisen?

    <p>Warm alkaline vents</p> Signup and view all the answers

    What is the result of the polymerization of small organic molecules?

    <p>Formation of organic macromolecules</p> Signup and view all the answers

    What is the role of montmorillonite clay in the origin of life?

    <p>It increases the rate of vesicle self-assembly</p> Signup and view all the answers

    What is the significance of the fourth stage in the sequence of events leading to the formation of first cells?

    <p>It enables the inheritance of traits</p> Signup and view all the answers

    What is the term used to describe the process of organic macromolecules being packed into membranes to form protocells?

    <p>Vesicle formation</p> Signup and view all the answers

    More Like This

    Early Earth and Emergence of Life Quiz
    12 questions
    Earth Formation and Origin of Life
    10 questions
    Earth's Origins and the Emergence of Life
    32 questions
    Use Quizgecko on...
    Browser
    Browser