Earth Science: Stars, Galaxies and The Universe

Which of the following is NOT true about the universe?

• the universe is expanding
• the universe is made up of an infinite number of galaxies
• the universe is everything
• the universe is smaller than a galaxy

Because almost all galaxies show red shifted spectra, we know that...

• nobody likes us. 
• the sky must be dark at night.
• the Milky Way is at the center of the universe.
• the universe is expanding. 

What is the longest wavelength of light?

• red
• blue
• green 
• yellow

If a galaxy is blue shifted it means that....

• it is moving away from our galaxy.
• it is moving toward our galaxy.
• it is sad. 
• it is frozen. 

If the universe continues to expand forever, it is an...

• open universe.
• closed universe. 
• flat universe. 

If the universe stops expanding but doesn't collapse it is a....

• open universe.
• closed universe. 
• flat universe. 

If the universe stops expanding and begins to contract, it is a...

• open universe.
• closed universe. 
• flat universe. 

The change in the frequency of wave due to the relative motion of the source of the wave relative to the observer is called....

• the Doppler Effect. 
• the Big Bang. 
• cosmic background radiation. 
• the Hubble Constant. 

What is cosmic background radiation?

• Microwave radiation that is left over from the Big Bang. 
• Radio waves that are emitted by the Sun.
• Energy that is coming from black holes. 

What is the shortest wavelength of light?

• red 
• blue
• green 
• yellow