Stellar Life and HR Diagrams

What will the Sun become at the end of its lifecycle?

• red giant
• red dwarf
• white dwarf
• super nova

Bigger stars have longer lives than smaller stars. 

• true
• false

Which of these puts the main parts of an average star's life cycle in the correct order?

• protostar> 
  main sequence>
  red giant >
  white dwarf
• protostar >
  main sequence> 
  white dwarf> 
  red giant
• main sequence> 
  protostar> 
  white dwarf> 
  red giant
• protostar> 
  red giant >
  main sequence> 
  white dwarf

The life cycles of stars are determined by their:

• mass (size)
• color
• distance from Earth
• luminosity

______ is a force that causes dust particles to stick together in a nebula.

• nuclear fusion
• gravity
• hydrogen
• friction

What is absolute magnitude?

• the process inside a star that produces the star's energy

• a star's brightness as it would be if it was measured at a standard distance

• star groupings in space

• the process inside a star that produces the star's energy

Brightness of a star as seen from Earth

• parallax
• apparent magnitude
• absolute magnitude
• spectrum

Which stage of its life cycle does a star spend most of its time in?

• nebulae
• red giant
• protostar
• main sequence

Which star stage is generally the HOTTEST?

• Supergiant

• Giant

• Main Sequence

• White Dwarf

Red stars are the _____________.

• hottest
• coolest
• biggest