Question

what evidence is there that the universe is expanding? *
new matter has been created as a result of other universal matter expanding outward.
the results of the big bang reveal an equal distribution of cosmic background radiation.
the doppler effect shows that light waves traveling through space shorten as the universe expands.
the universe is not expanding

Explanation:

• Option 1: The universe's expansion does not involve creating new matter from expanding matter; matter conservation and cosmic principles don't support this.
• Option 2: Cosmic background radiation (CMBR) is nearly uniformly distributed, a remnant of the Big Bang, and this uniformity (along with its properties) supports the Big Bang and expansion model.
• Option 3: The Doppler effect for light from distant galaxies shows redshift (light waves stretch, not shorten) as galaxies move away, indicating expansion. This option has an error in "shorten".
• Option 4: Scientific consensus (from evidence like redshift, CMBR) confirms the universe is expanding, so this is incorrect.

Answer:

B. The results of the Big Bang reveal an equal distribution of cosmic background radiation.