During an investigation the variable that remains unchanged throughout the course of the investigation to ensure validity.Answer 3 Question 1

The variable that remains unchanged throughout the course of an investigation to ensure validity is known as the "Control Variable". This variable is not manipulated or changed during the experiment, allowing the researchers to ensure that the results they obtain are solely due to the variable they are testing (the independent variable), and not some other factor.

Here are the steps to answer this question:

1. Understand the question: The question is asking for the term used to describe a variable that does not change during an investigation or experiment.

2. Recall the relevant concept: In scientific investigations, there are typically three types of variables: independent variables (the factor that is manipulated or changed), dependent variables (the factor that is measured), and control variables (factors that are kept constant to ensure the validity of the results).

3. Formulate the answer: The term that describes a variable that remains unchanged throughout an investigation to ensure validity is the "Control Variable".