Star life cycle

The only force acting on the nebulae is ________.

• thermal
• singular
• gravity
• microscopic

A star is born when ________________ begins to happen.

• nuclear fusion
• nuclear abrasion
• crying
• nuclear fission

The core of a Red Giant collapses and becomes a ___________________.

• White Dwarf
• Blue Supergiant
• Red Supergiant
• Black Hole

After a supernova, the core can collapse into a neutron star, or if massive enough even a ___________.

• Black Hole
• White Dwarf
• Brown Dwarf
• Black Dwarf

When a Red Giant's outer atmosphere drifts away it is now known as a ____________.

• planetary cloud
• White Dwarf cloud
• planetary nebula
• expanding nebula

More massive stars continue to fuse elements in their cores all the way up to ________.

• silicon
• iron (Fe)
• carbon
• plutonium

As gravity pulls gas and dust into a sphere that becomes denser and hotter, and a sunlike star begins to form, it is called a(n)

• white dwarf
• red dwarf
• supergiant
• protostar

a gigantic explosion that causes the death of a large star

• pulsar
• red giant 
• supernova
• black hole

a spinning neutron star that emits rapid pulses of energy

• red giant 
• pulsar
• black hole
• supernova

The color of a star depends on its

• size
• temperature
• shape
• magnitude