Star Evolution

What are stars?

• Huge spheres of hot gas that emits light and other radiation
• Bright spheres made of different types of rock and metals
• Large reflective objects in space
• Satellites that orbit around planets

Tags

NGSS.HS-ESS1-3

A star is born and lit up  when ______ happens and provides the star with energy that it will use for millions of years.

• nuclear fusion
• gravity
• hydrogen
• iron

All stars begin __________?

• as a giant

• in a black hole

• as a white dwarf

• in a nebula

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

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

Stars can go through different stages due to their initial . . .

• temperature

• mass

• brightness

• color

After the main sequence, a low mass star becomes a

• black dwarf
• protostar
• red giant
• supergiant

Tags

NGSS.HS-ESS1-3

When a nebula heats up, an "almost" star forms in the middle. It is called a

• supernova

• supergiant

• white dwarf

• protostar

In this stage, a star spends most of its life. Hydrogen is fused into helium at a temperature of millions of degrees.

• nebula
• protostar
• main-sequence
• supergiant

Low mass stars expand into what after using up the hydrogen in their core

• red giants
• supergiants
• white dwarfs
• protostars

The final stage of a low mass star is a 

• neutron star
• nebula
• black hole
• black dwarf

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3