Unit 1: Forming Our World(Universe) Test Review

To an observer on Earth, the Sun appears brighter than the star Rigel because the Sun is..... due to its apparent magnitude.

• hotter than Rigel 
• more luminous than Rigel
• closer than Rigel
• larger than Rigel

Which sequence correctly lists the relative sizes from largest to smallest?

• Universe, Milky Way Galaxy, our Solar System
• Our Solar System, Milky Way Galaxy, Universe
• Milky Way Galaxy, Universe, our Solar System
• Milky Way Galaxy, Our Solar System, Universe

To truly be a star, an object.....

• must emit its own energy and be close the the center of the galaxy
• must be made of gas and have planets revolving around it
• must be made of gas and emit its own light
• it must be the center of the galaxy and emit its own light

All of the factors below determine the true brightness of stars EXCEPT

• Mass
• Size 
• Temperature 
• Distance

A star may appear brighter mainly due to....

• temperature 
• distance
• size
• color

As an observer of this spectrum, this star would be

• staying still
• moving away 
• moving toward 
• orbiting Earth

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

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

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