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K12 LibreTexts

23.5: Beyond the Solar System- Challenge 1

  • Page ID
    6239
  • 1. Giant spheres of high temperature, glowing gas are ___.
    stars
    2. Stars appear to move across the sky every night because ___.
    the earth rotates on its axis
    3. The ancient ___ civilization created the Zodiac.
    Babylonian
    4. ___ are natural fusion reactors.
    Stars
    5. ___ keeps stars from collapsing under their own gravity.
    Fusion reactions
    6. Nuclear fusion is the process by which ___.
    atoms join together and release a lot of energy
    7. In the Hertzsprung-Russell Diagram, ___ is indicated on the y-axis.
    luminosity
    8. The main sequence stars range from ___ to ___.
    large, blue stars; small, red stars
    9. Zeta Ophiuchi is a ___ star.
    blue-colored
    10. The Pillars of Creation are a ___ in the Eagle Nebula.
    stellar nursery
    11. New stars form from ___ called ___.
    clouds of gas and dust; nebulae
    12. ___ are stellar nurseries.
    Nebulae