Endogenic Processes: Inside Earth Activities
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Questions and Answers

What is one factor that contributes to the formation of magma?

  • Decrease in temperature
  • Increase in density
  • Increase in pressure
  • Addition of volatiles (correct)
  • What is the definition of half-life?

  • The time needed for a radioactive substance to reach its peak activity
  • The time needed for a radioactive substance to fully disintegrate
  • The time needed for a radioactive substance to become stable
  • The time needed for a radioactive substance to decay by half (correct)
  • In magma formation, what is decompression related to?

  • Increase in pressure
  • Increase in temperature
  • Decrease in pressure (correct)
  • Decrease in density
  • How is heat transferred during magma formation as described in the text?

    <p>Through convection</p> Signup and view all the answers

    Where do subduction zones occur?

    <p>At convergent plate boundaries</p> Signup and view all the answers

    What is the main cause of the Earth's internal heat according to the passage?

    <p>Gravitational contraction and radioactive decay of elements</p> Signup and view all the answers

    Which of the following is not one of the four long-lived radioactive isotopes mentioned in the passage that continuously produce heat?

    <p>Radium-226</p> Signup and view all the answers

    According to the core accretion model described in the passage, what was the initial source of the Earth's internal heat?

    <p>Collision and sticking together of small pieces of matter left over from the formation of the sun</p> Signup and view all the answers

    What is the primary mechanism by which gravitational contraction of the Earth converted to internal heat?

    <p>The conversion of gravitational potential energy to thermal energy</p> Signup and view all the answers

    What is the main reason the Earth's interior is still hot today?

    <p>Radioactive elements are still undergoing decay and releasing heat</p> Signup and view all the answers

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