Life Cycle of a Star

1234567891011121314
Across
  1. 6. All stars start in a ______________ ___________.
  2. 10. The core left behind after a supernova.
  3. 11. A star is born when the gas and dust from a nebula become so hot that _____ ____ starts.
  4. 13. What is the main fuel for a star?
  5. 14. The white dwarf eventually runs out of energy, dies and becomes a ______ dwarf.
Down
  1. 1. When a low to medium mass star begins to run out of hydrogen and begins to fuse helium it becomes a ____ _______.
  2. 2. The blue-white hot core of a small to medium mass star that is left behind cools and becomes a ______ dwarf.
  3. 3. Left behind after a supernova, nothing can escape not even light.
  4. 4. The outer layers of a red giant continue to drift into space forming a ____________ ___________.
  5. 5. How long a star exists depends on a stars _______.
  6. 7. A star will spend most of its life as a _____ ________ star.
  7. 8. Contracting cloud of gas and dust in a nebula.
  8. 9. Explosion of a red supergiant star.
  9. 12. Element stars begin to fuse as the hydrogen runs out