Big Bang Theory

According to the Big Bang Theory how old is the universe?

• Thousands of years.
• Millions of years.
• Billions of years.
• Eternal.

In relation to us, most galaxies are…

• Moving toward us
• Moving away from us
• Not moving

Why is the CMB so cool now? 

• The expansion of the Universe has cooled the radiation and stretched its wavelengths
• Dense clouds of dust have blocked most of it. 
• The cosmological constant has "squashed" its wavelengths and cooled it. 
• Hydrogen atoms have condensed on it and chilled it.

Which piece of evidence supports the Big Bang theory?

• The more distant galaxies are moving the slowest
• The more distant galaxies are moving the quickest
• The more distant galaxies are moving towards us
• Galaxies and space is not changing

The event that marks the beginning of our known universe

• Theory of Evolution
• Big Bang Theory
• Cell Theory
• Blackhole theory

The scientific study of planets, stars, galaxies, and the universe as a whole.

• Astronomy
• Geology
• Cosmology
• Quantum Physics

The change in wavelength of light or sound that is due to the relative motion of the source towards or away from an observer.

• Radar Effect
• Doppler Effect
• Light Effect
• Reflection

The "afterglow" of the energy from the origin of the universe that we see today.

• Cosmic radiation
• sunlight
• Doppler effect
• Cosmic explosions

What does the Big Bang theory suggest?

• The universe was just there
• The Milky Way is the only solar system
• The universe is continually expanding
• The universe started as a point and is moving towards each other

According to the Doppler effect, what happens to the sound waves in a car moving away from you?

• They move more quickly, so their pitch increases
• Their frequency increases, so their pitch increases
• Their wavelength increases, so their pitch increases