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5 questions
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  • Q1

    Why is the internal heat of the Earth important to life?

    I. It fuels photosynthesis.

    II. It causes plates to move.

    III. It makes Earth like other planets.

    IV. It causes the formation of landforms.

    I and III

    III and IV

    I and II

    II and IV

    30s
    S11/12ES-Ib-14
  • Q2

    How does radioactive decay contribute to Earth's internal heat?

    Radioactive atoms tend to have a less stable form.

    Particles of dust origin collided and accumulated.

    To become more stable, radioactive atoms emit high energy particles and waves.

    Materials in the earth moved and separated into layers.

    30s
    S11/12ES-Ib-14
  • Q3

    How does differentiation energy add to Earth’s internal heat?

    Movement of materials produce friction that is converted to heat.

    Planetesimals collided and grew into a terrestrial planet.

    Radioactive isotopes emit high energy waves and particles.

    Denser materials rise to the surface and lighter ones sink to the center.

    30s
    S11/12ES-Ib-14
  • Q4

    How does accretional energy add to Earth’s internal heat?

    Planetesimals collided and grew into a terrestrial planet.

    Movement of materials produce friction that is converted to heat.

    Denser materials rise to the surface and lighter ones sink to the center.

    Radioactive isotopes emit high energy waves and particles.

    30s
    S11/12ES-Ib-14
  • Q5

    Which of the following is NOT TRUE about Earth’s internal heat?

    It comes from the sun.

    Radioactive atoms contribute to around 50% of this heat.

    It comes from Earth’s layers.

    It is acquired during the early years of Earth’s life.

    30s
    S11/12ES-Ib-14

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