Stages of Star Evolution: From Magnesium to Iron

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Questions and Answers

What celestial object is formed when a protostar runs out of material before achieving nuclear fusion?

  • Planet
  • Supernova
  • White dwarf
  • Brown dwarf (correct)

Which event led to the formation of the Crab Nebula?

  • Protostar collapse
  • Supernova (correct)
  • Nuclear fusion
  • White dwarf formation

What is the role of protostars in star formation?

  • First step in forming a star (correct)
  • Creating black holes
  • Triggering supernovae
  • Forming planetary nebulae

What do celestial objects called 'protostars' lack in their cores?

<p>Nuclear fusion (A)</p> Signup and view all the answers

What happens if a protostar cannot create nuclear fusion at its core?

<p>Becomes a brown dwarf (D)</p> Signup and view all the answers

What is the status of gas in a protostar undergoing gravitational compression?

<p>Collapsing into a sphere (D)</p> Signup and view all the answers

Which type of celestial object is between a planet and a star?

<p>Brown dwarf (B)</p> Signup and view all the answers

What will result if a protostar can successfully create nuclear fusion?

<p>New star formation (B)</p> Signup and view all the answers

What is the significance of protostars in stellar evolution?

<p>They mark the beginning of star formation (A)</p> Signup and view all the answers

What happens if the protostar can't become large enough to achieve nuclear fusion?

<p>It becomes a brown dwarf. (B)</p> Signup and view all the answers

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