Reach For The Stars Astronomy Worksheets With Answer Key Page 9
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16Reach for the Stars 2012
Part B2: Stellar Evolution (1 point each)
74. How does a star begin its life?
The following are steps in stellar evolution. Put them in order from the beginning life of a star to the end of life.
a. Nuclear fusion occurs which caused the star to glow.
b. A Red giant forms when the star’s hydrogen level drops.
c. A supernova occurs
d. A main sequence star, which can live for millions or even billions of years, forms.
e. If it is massive star, a neutron star forms. If it is a super massive star, a black hole forms.
f.
Gravity pulls hydrogen gas together to form a cloud.
g. Iron, which acts as an energy sponge, forms within the star.
Answer _____ _____ _____ _____ _____ _____ _____
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Part B3: Open and Globular Clusters (1 point each)
82. How are constellations and star clusters different?
83. What makes open and globular clusters so different?
84. How do astronomers measure the distance in clusters whose distance is not known?
Fill in the table:
Cluster
Open or Globular Cluster
Pleiades in Tarus
85.
M13 in Hercules
86.
Beehive in Cancer
87.
Part B4: Galactic Types and Structures (1 point each)
88. What holds the gas, dust and millions (billions or trillions) of stars together in a galaxy?
89. What are the three categories of common galaxies?
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