Download DR 19.2 - Cobb Learning

Name_________________________________________________ Date_________________ Period______________
DR 19.2 – p. 590
Section: The Life Cycle of Stars
THE BEGINNING AND END OF STARS
______ 1. Which of the following statements is NOT true about stars?
a. A star begins its life as a ball of gas and dust.
b. As stars get older, they lose some of their material.
c. Stars last forever.
d. New stars form from the material of old stars.
2. During a star’s life cycle, hydrogen changes to helium in a process called ______________________.
3. When a star dies, either gradually or in a big explosion, much of its material returns to _____________.
DIFFERENT TYPES OF STARS
______ 4. All of the following characteristics are used to classify stars EXCEPT
a. age.
c. brightness.
b. name.
d. temperature.
______ 5. Which one of the following is NOT true about stars?
a. A star goes through many changes during its life cycle.
b. A star can become a different type of star as it gets older.
c. A star can be classified as more than one type of star during its life cycle.
d. A star does not change during its life cycle.
Match the correct description with the correct term. Write the letter in the space provided.
______ 6. small, hot star in final stage of its life cycle
______ 7. star in second and longest stage of its life cycle
a. red giant star
b. white dwarf star
c. main-sequence star
______ 8. large, cool star in third stage of its life cycle
9. Explain how energy is generated in the core of a star during the second stage of its life cycle.
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10. Explain what happens during the third stage of a star’s life cycle as the star uses up all of its hydrogen.
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11. Explain the final stage of a star’s life cycle by describing what happens once a star has lost all of its hydrogen.
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A TOOL FOR STUDYING STARS
______ 12. The H-R diagram shows the relationship of a star’s temperature to its
a. brightness.
c. size.
b. color.
d. age.
______ 13. On what part of the H-R diagram would you find the majority of the main-sequence stars?
a. top half
c. middle
b. bottom half
d. far corners
14. According to the H-R diagram, the star Canopus has a temperature of about ______________________ and an absolute
magnitude of ______________________.
Match the correct description with the correct term. Write the letter in the space provided.
______ 15. top of modern H-R diagram
______ 16. bottom of modern H-R diagram
______ 17. right side of modern H-R diagram
a.
b.
c.
d.
hot (blue) stars
bright stars
cool (red) stars
dim stars
______ 18. left side of modern H-R diagram
19. Place these stars in order from earliest in life cycle to oldest in life cycle: red giant, white dwarf, main-sequence star.
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20. As they age, ______________________ stars move up and to the right on an H-R diagram.
Match the correct description with the correct term. Write the letter in the space provided.
______ 21. stars with low mass, low temperature, and low absolute magnitude
______ 22. small hot stars that are dimmer than the sun
______ 23. high-temperature stars that quickly use up their hydrogen
______ 24. cool stars with absolute magnitude
______ 25. stars in the band that runs along the middle of the H-R diagram
WHEN STARS GET OLD
______ 26. Which one of the following statements is NOT true of supernovas?
a. They are explosions in which a massive star collapses.
b. They are explosions that occur at the beginning of a star’s life.
c. They can be brighter than an entire galaxy for several days.
d. They are explosions in which a star throws its outer layers into space.
27.A star that has collapsed under gravity is called a(n) ______________________.
28.A rapidly spinning neutron star is called a(n) ______________________.
29. An object so massive that light cannot escape its gravity is a ______________________.
a.
b.
c.
d.
e.
massive blue stars
white dwarf stars
main-sequence stars
red dwarf stars
red giant stars