Quartely 2 Review

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 Cosmic Microwave Background 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

The greater the redshift:

• the faster the galaxy is moving.
• the shorter the light waves.
• the bigger the galaxy.
• the closer the galaxy.

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.

Spinning of the Earth on its axis is called...

• rotation
• revolution
• orbit
• double axis