E.S. Space unit II: Stars

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a.obeso.III
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308419
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E.S. Space unit II: Stars
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2015-09-24 13:20:46
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Test Friday 9/25 100 pts Multiple Choice & Matching
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  1. What is a non-visible radiation telescope used for?
    To focus non-visible radiation from space
  2. What is a reflecting telescope?
    An instrument that reflects light to focus far away objects
  3. What is a refracting telescope?
    An instrument that bends light to focus far way objects
  4. What is the relationship between high energy and wavelength?
    High energy means short wavelength
  5. What is the relationship between low energy and wavelength?
    Low energy means Long wavelength
  6. What is the first stage in the life cycle of a typical star and describe that stage.
    Nebula, a cloud of gas & dust
  7. What is the second stage in the life cycle of a typical star and describe that stage.
    Protostar: Gravity changes the nebula into a protostar
  8. What is the third stage in the life cycle of a typical star and describe that stage.
    Main Sequence: Gravity changes the protostar into a sphere; 10 million oC, nuclear fusion begins, a star is born
  9. What is the fourth stage in the life cycle of a typical star and describe that stage.
    Red Giant: When nearly all hydrogen turns to helium, the star expands as a red giant
  10. What is the fifth stage in the life cycle of a typical star and describe that stage.
    Planetary Nebula: The red giant expands & cools into a planetary nebula; carbon & oxygen fuse, nuclear fusion stops, the star dies
  11. What is the sixth/final stage in the life cycle of a typical star and describe that stage.
    White Dwarf: The gases drift away, the core collapses into a white dwarf
  12. What is the first stage in the life cycle of a massive star and describe that stage.
    Nebula, a cloud of gas & dust
  13. What is the second stage in the life cycle of a massive star and describe that stage.
    Protostar: Gravity changes the nebula into a protostar
  14. What is the third stage in the life cycle of a massive star and describe that stage.
    Main Sequence: Gravity changes the protostar into a MASSIVE sphere; 10 million oC, nuclear fusion begins, a star is born.
  15. What is the fourth stage in the life cycle of a massive star and describe that stage.
    Red Supergiant: When nuclear fusion slows, the star expands into a red supergiant. The red supergiant collapses, iron fuses.
  16. What is the fifth stage in the life cycle of a massive star and describe that stage.
    Supernova: (iron fuses), nuclear fusion stops, the star dies; it explodes as a supernova
  17. What is the sixth/final stage in the life cycle of a massive star and describe that stage.
    Neutron Star: The core collapses as a neutron star
  18. What is the H-R diagram?
    A graph that shows the relationship between the temperature, absolute magnitude, luminosity, and life cycle of a star
  19. Where are most stars found on the H-R diagram and what does it mean?
    Most stars are found in the Main Sequence band, which means most stars are in the main sequence stage of life
  20. What is apparent magnitude?
    How bright a star appears to be from Earth
  21. What is absolute magnitude
    How bright a star actually is
  22. What is apparent motion?
    How a star appears to be moving
  23. What is actual motion?
    How a star is actually moving
  24. Describe red shift.
    A star appears red because it is moving away from Earth and the light waves are getting stretched out (longer)
  25. Describe blue shift.
    A star appears blue because it is moving toward Earth and the light waves are getting compressed (squished)(shorter)
  26. Define luminosity.
    The amount of energy a star gives off
  27. Define the Doppler Effect.
    The apparent change in the frequency of a wave when the source or observer is moving
  28. Summarize the life of an average star.
    • Nebula, a cloud of gas & dust
    • Gravity pulls it into a protostarGravity changes the protostar into a sphere (main sequence)
    • 10 million oC , Nuclear fusion begins , A star is born
    • When nearly all H turns to He, The star expands into a red giant
    • The red giant expands & cools into a planetary nebula
    • Carbon & Oxygen fuse , Nuclear fusion stops , The star dies
    • The gases drift away, The core collapses into a white dwarf
  29. Define Star Composition.
    What the star is made up of
  30. Summarize the life of a massive star.
    • Nebula, a cloud of gas & dust Gravity pulls it into a protostar
    • Gravity changes the protostar into a
    • MASSIVE star 10 million oC , Nuclear fusion begins , A star is born
    • When nuclear fusion slows, The star expands into a Red Supergiant
    • The red supergiant collapses, Fe (iron) fuses , nuclear fusion stops , the star dies
    • It EXPLODES as a Supernova
    • The core condenses into a Neutron Star

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