14. copernicus's model of the universe differs from ptolemy's because copernicus believed
a. the sun and earth share a central point from which the other planets rotate around them.
b. earth rotates on its axis and orbits the sun.
c. earth orbits the sun but remains stationary on its axis.
d. earth is still at the center but rotates on its axis.

B. Earth rotates on its axis and orbits the sun.

Explanation:

The model given by Ptolemy was a geocentric model. It described Earth as the center of the universe and remains stationary on its axis.

Copernicus gave a heliocentric model. The sun is at the center of the solar system and Earth revolves around the sun as well as rotates on its axis.

Thus, the correct option is B.

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.