What is a scientific theory? The sentences above help to describe a scientific theory. One sentence is not quite accurate though. Choose the sentence that needs to be modified and make the necessary modification so it may be

included in the description of a theory.

A)

D. A scientific theory has a simple basis: an experiment done to test a

hypothesis.

B)

C. Theories are descriptions, often mathematical descriptions of natural

phenomenon;

A. A scientific theory is based on a scientific investigation that supports a

hypothesis.

D)

B. When new information does not support a scientific theory, the theory

may be revised or sometimes rejected.

Original sentence: When new information does not support a scientific theory, the theory  may be revised or sometimes rejected.  

New changed sentence: When the results of the experiment do not support a hypothesis, the hypothesis must be revised or rejected to state a new scientific theory.

Explanation:

The scientific theory is a conceptual framework used to explain facts or phenomena and to make predictions.

The theory is fundamental to science because it allows scientists to organize and understand observations.

The construction of a theory begins with a hypothesis. The scientist believes that a phenomenon occurs in a certain way, so he/she performs observations under the scientific method to prove that his/her hypothesis is valid or not valid. The systematization of the observations and the empirical data collected might derive from a scientific theory that explains the analyzed phenomenon.

A scientific theory is a knowledge that has been contrasted in several ways.