The universe

The three pieces of evidence for our current theory of the universe are:

• blueshift, CMB, moon landing.

• redshift, IBM, Andromeda galaxy.

• redshift, CMB, distribution of elements.

• doppler effect, light spectra, fusion.

Galaxies that are redshifted are:

• actually blue.
• really far away.
• invisible.
• moving away from us.

The universe is expanding!  This means that:

• all of the galaxies are spreading out.
• the universe must have started from a single point.
• the universe is cooling down.
• all of the above.

The CMB is:

• the remaining energy from the big bang.
• incredibly hot.
• visible to the human eye.
• only located in certain places in the universe.

Light waves that are stretched out by objects moving apart:

• have a shorter wavelength.
• travel faster than the speed of light.
• are invisible.
• appear more red.

CMB stands for:

• Colorful Mystic Background Rehearsal.
• Cosmic Mini Butterfly Repellent.
• Cosmic Microwave Background Radiation.
• Cute Microwave Button Reversal.

The universe is ____________ years old.

• 8.13 billion
• 13.8 billion
• 1.83 billion
• 381 million

What is true about these stars?

• Both of these stars are moving away from us.
• Both of these stars are moving towards us.
• Both of these stars are blueshifted.
• The star Sirius is closer to us.

What can we conclude from the observation that nearly all galaxies are moving away from us?

• Massive black holes are drawing galaxies away from Earth.
• The Sun and Earth are located at the center of the universe.
• Everything in the universe is moving the same direction.
• The once-smaller universe is expanding in all directions.

Which of the following is the best description of the Big Bang Theory?

• The Big Bang Theory is the prevailing model about the universe’s origin and is supported by observations of the universe’s expansion.
• The Big Bang Theory is just one of the ideas about the universe’s origin, many of which are equally respected by the scientific community.
• The Big Bang Theory states that pre-existing matter was compacted into a hot and dense form and suddenly exploded into infinite, empty space.
• The Big Bang Theory is the scientific explanation of how the Sun, Earth, and the rest of the Solar System were formed at the beginning of time.