Astronomy Unit Review

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

a gigantic explosion that causes the death of a large star

• pulsar
• red giant 
• supernova
• black hole

What color are the hottest stars?

• red
• yellow
• orange
• blue

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 in the main sequence stage are fusing ________ into ________ in their cores.

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

What is the relationships between the size of a star and its lifetime?

• The larger the star, the shorter the lifetime.
• The larger the star, the longer the lifetime.