The theories on the origin and expansion of the universe have changed from time to time. which of these best explains why the theories about the universe change over a period of time? (2 points) new scientific investigations lead to new theories modern scientists reject old theories in every century the universe evolves constantly and requires new theories to describe it the discoveries of all scientists in different centuries have to be incorporated

new scientific investigations lead to new theories

Explanation:

The investigation into the origin of the universe is a continuous one and new facts or hypothesis keep emerging everyday.

One of the characteristics of scientific theories is that they are subject to changes when new widely tested facts emerge concerning the theory.

Consequently, the existing theories keep getting modified or changed completely as new facts emerge from new scientific investigations.

answer; ///i believe that the correct answer is (the worksheet);

it would be the percentage of food eaten by the flock

i remember doing this lab