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Sci. 4-2 The life Cycle of Stars Pages 105-109

Learn about the fascinating life cycle of stars, from the formation of new stars to the explosive end of massive stars known as supernovas. Discover the Hertzsprung-Russell diagram and its relationship between temperature and brightness of stars. Explore the different stages of a star's life, including main sequence stars, red giants, white dwarfs, and even the mysterious black holes. This informative video provides a comprehensive overview of the life cycle of stars.

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Sci. 4-2 The life Cycle of Stars Pages 105-109

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  1. Sci. 4-2 The life Cycle of Stars Pages 105-109

  2. A. New stars form from the material of old stars that have gone through their life cycles.

  3. B. Hertzsprung- Russell or H-R Diagram- a graph showing the relationship between star’s surface temperature and its absolute magnitude. 1) H-R diagram relates the temperature and brightness of stars. It also illustrates the life cycle of stars.

  4. http://www.youtube.com/watch?v=HfqcZdNnQ6s

  5. Main Sequence- a diagonal pattern of stars on the H-R diagram. • 1) Small mass stars are found at the right end. • 2) As main sequence stars age, they move up and to the right on the H-R diagram to become giants and supergiants.

  6. D. Most stars are main sequence stars. Red giants and white dwarfs are later stages in a star’s life cycle.

  7. Blue stars may explode in a tremendous flash of light called a supernova. • Supernova- basically the death of a large star by explosion. • Silver, gold, and lead are formed by supernova.

  8. F. Neutron Star- a star in which all the particles have become neutrons, the collapsed remains of a supernova.

  9. G. Pulsars- spinning neutron stars

  10. H. Black Holes- an object with more than three solar masses squeezed into a ball only 10 km across whose gravity is so strong that not even light can escape.

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