Origins Quiz Key B

Use your journal to answer these questions:

  1. How long ago did the solar system form? 4.6 bya
  2. The heavier elements of the solar system came from earlier super nova
  3. What became of the material left over from the sun's formation? formed rest of solar system (planets and asteroids).
  4. What became of Theia's heavier elements? sank into and added to the Earth's core
  5. What happened to a large portion of the Earth's crust after the collision with Theia? formed the moon
  6. Describe three outcomes for the earth due to the collision with Theia. Changed Earth’s axis to produce the large 23.5° axial tilt, may also have sped up Earth’s rotation and initiated plate tectonics.
  7. In your earth model, how many grams of clay did you use for the crust? 2 g
  8. Which layer of the Earth has the least volume? inner core
  9. Complete the table
    Earth layer Composition Phase
    Crust silicate minerals solid
    mantle Fe-Mg silicate minerals plastic (liquid-like)
    outer core Fe and other elements thick liquid
    inner core metals such as Fe and Ni solid
  10. On the back of this paper record your answer to Sept 17th's warmup. Compare and contrast mixtures and pure substances.