Download _____ 1. Which of the following statements is NOT true about stars

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READING GUIDE 19-2: THE LIFE CYCLE OF STARS (PG. 590-595)
THE BEGINNING AND END OF STARS: PAGE 590
_____ 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: PAGE 590 - 591
4. List 7 different ways that stars can be classified below:
__________________________
____________________________
__________________________
____________________________
__________________________
____________________________
__________________________
_____ 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
_____ 8. large, cool star in third stage of its life cycle
a. red giant star
b. white dwarf star
c. main-sequence star
9. Main sequence stars are stars that are in their ______________________ and
__________________________ stage of their lives. In this stage energy is
generated as ___________________________ atoms fuse together into
_____________________________ atoms. A main sequence star will begin
to change once the hydrogen begins to run out.
10. The red giants stage begins after the ___________________________ stage of
a star. In this 3rd stage a red giant will _____________________ and
___________________ once it has used up all of its hydrogen. The center of
the star will _________________ as the atmosphere begins to grow large. The
mass of the star will determine if it will be a red giant or a supergiant.
11. What is the difference between a red giant and a supergiant?
______________________________________________________________
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11. White dwarf is the _________________ stage of an average size star’s life
cycle. Massive and super massive stars will not end at this stage.
WHEN STARS GET OLD: PAGE 594 - 595
_____ 12. 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.
13. A star that has collapsed under gravity is called a(n) ____________________.
14. A rapidly spinning neutron star is called a(n) _________________________.
15. An object so massive that light cannot escape its gravity is a
_________________________.
A TOOL FOR STUDYING STARS: PAGE 592-593
16. The H-R diagram shows the relationship of a star’s temperature to its
___________________ __________________.
17. In the middle part the H-R diagram, the majority of the stars are in their
_____________ ________________ stage.
18. 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.
_____ 19. top of modern H-R diagram
_____ 20. bottom of modern H-R diagram
_____ 21. right side of modern H-R diagram
a.
b.
c.
d.
hot (blue) stars
bright stars
cool (red) stars
dim stars
_____ 22. left side of modern H-R diagram
Match the correct description with the correct term. Write the letter in the
space provided.
a. massive blue stars
_____ 24. stars with low mass, low temperature, and low
b. white dwarf stars
absolute magnitude
c. main-sequence stars
_____ 25. small hot stars that are dimmer than the sun
d. red dwarf stars
e. red giant stars
_____ 26. high-temperature stars that quickly use up their
hydrogen
_____ 27. cool stars with a high absolute magnitude
_____ 28. stars in the band that runs along the middle of the H-R diagram