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Ninth Grade (Grade 9) Stars Questions

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Grade 9 Stars
Which of the following stars is most likely to have a degenerate helium core at some point?
  1. A star that is a tenth the mass of our Sun.
  2. A star that is the same mass as our Sun.
  3. A star that is four times bigger than our Sun.
  4. A star that is ten times bigger than our Sun.
Grade 9 Stars
What kind of stars are NOT usually found in a globular cluster?
  1. Red Giants
  2. Main Sequence
  3. High Mass
  4. Low Mass
Grade 9 Stars
What will happen to a low mass star on the HR diagram after it begins ejecting its envelope near the end of its life?
  1. It will move upward, becoming more luminous.
  2. It will move to the right, becoming cooler.
  3. It will move immediately downward, becoming less luminous.
  4. It will move to the left, appearing hotter as the core is exposed.
Grade 9 Stars
About how many stars are there in the Milky Way galaxy?
  1. 100 billion
  2. 200 billion
  3. 300 billion
  4. 400 billion
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