Which of the following facts supports the big bang theory and disproves the static model of the Universe?
A.
Most galaxies appear to be moving away from each other.
B.
Stars are constantly forming and dying.
C.
Stars are held together by gravity within galaxies.
D.
Light moves at a constant speed through empty space.

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.