Question

In a scientific experiment, how many independent variables should be tested at the same time? a none. Independent variables are not part of an experiment. b three or more - its important to use as many as needed. c two so that we make the experiment more productive. d one so that we can understand the if the variable really makes a change.

Answer 1

D

Step-by-step explanation:

It is important that we have two variables, Independent

and Dependant Variable.