Answer:
Theories change or are modified to the new theory
Explanation:
The scientific process involves building on the accepted research of that time. Let us take the example of the heliocentric model of the solar system. Before the heliocentric model was accepted the geocentric model was the accepted model. Galileo proved that the Earth revolves around the sun and not vice versa. Although Galileo faced opposition in the beggining his model is the one which is accepted today. Through observations by telescopes it was proven that the Earth revolves around the sun.
This example shows how a previously accepted model was rejected as the newer model was proven. Thus changing the theories related to the previous model.
