Universe 101

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

A black hole is an object so dense with so much gravity that even ________ cannot escape.

• man
• bacon
• spaceships
• light

a gigantic explosion that causes the death of a large star

• pulsar
• red giant 
• supernova
• black hole

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

As our sun continues through its life cycle, it will _________.

• gradually get smaller and smaller until it dies out.
• Gradually get larger until its outer layers drift off.
• become denser and denser until it forms a black hole.
• become hotter and hotter until it becomes a blue hypergiant.

All stars the main sequence are middle aged. That is, they are fusing ________ into ________ in their cores.

• hydrogen into helium
• helium into carbon
• oxygen into iron
• helium into hydrogen

How did the elements we have on Earth get here?

• They are all man-made.
• They were formed in stars that eventually exploded in supernova.
• The sun created all of our elements through fusion.
• Elements blew to earth through solar wind.

What is the correct life cycle of a star like our Sun?

• Nebula, main sequence, red supergiant, supernova, black hole, neutron star
• nebula, main sequence, red giant, planetary nebula, white dwarf, black dwarf 
• Main sequence, white dwarf, red giant, red supergiant, nebula
• Nebula, main sequence, brown dwarf, white dwarf, black dwarf