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Astronomy CA REVIEW

Astronomy CA REVIEW. Topics: Star Characteristics Star Life Cycles Galaxies Earlier topics are under Files: 3-1 REVIEW and 3-2 REVIEW. We are learning to : examine the life cycle of a star (characteristics; HR diagram)

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Astronomy CA REVIEW

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  1. Astronomy CA REVIEW Topics: Star Characteristics Star Life Cycles Galaxies Earlier topics are under Files: 3-1 REVIEW and 3-2 REVIEW

  2. We are learning to: examine the life cycle of a star (characteristics; HR diagram) We are looking for: a description of how stars are classified by characteristics and then organized on an HR diagram. Characteristics Size- Giant, main sequence, and dwarf Temperature- blue=hot; red=cooler Brightness- apparent brightness and absolute magnitude HR diagram shows temperature, brightness, color of stars and where the star is in its life cycle. Used to graph the surface temperature (x-axis) vs. brightness (y-axis) Hotter stars are on left side of graph; cooler stars on the right side of the graph Brighter stars on top of graph; dimmer stars on bottom of graph

  3. Which characteristic of stars cause them to be different colors? • chemical composition • distance • size • temperature • I need help.

  4. Which color would describe the youngest and hottest star? • blue • red • orange • yellow • I need help!

  5. Which star would be the brightest if all the stars are the same distance from Earth? • Main sequence • Neutron Star • Red super giants • White dwarf • I need help.

  6. How would you classify our star, the sun, on the H-R diagram? • Main sequence • Red giant • White dwarf • Red supergiant • I need help.

  7. We are learning to: Examine the life cycle of a star and predict the next likely stage . We are looking for: progression of the stages of a star’s life Nebulae- cloud of gas and dust Protostar- fusion begins Main sequence- average star Giant/red-giant- more massive stars Nova/supernova - exploding star White dwarf- no nuclear process Black dwarf- no heat or light Black Hole (area of large gravitational attraction) or Neutron star (very dense star)

  8. If given a protostar, what is the next likely stage of the star? • Super Giant • Nova • Main Sequence • Neutron Star • I need some help

  9. What is the first stage of the birth of a star? • Main sequence • Nebula • Giant • Dwarf • I need some help.

  10. What happens to the most massive stars as they near their death? • super nova to a black hole • super nova to a red giant • becomes a white dwarf • nothing happens • I need some help.

  11. What is the next likely stage of our sun? • White dwarf • Black dwarf • Red giant • Super nova • I need help

  12. We are learning to: explain that universe has billions of galaxies and are classified by shape • We are looking for: shapes of galaxies • Spiral- mix of old and new stars • Elliptical- more developed galaxies with older stars • Irregular-newer galaxies with newer stars

  13. By what are galaxies classified? • Color • Temperature • Size • Shape

  14. What type of galaxy is illustrated in the following picture? • Irregular • Spiral • Elliptical • I have no idea.. I need help!

  15. What type of galaxies contain older stars? • Elliptical • Irregular • Barred shape • spiral

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