Question

1. the _____________ variables (constants) are those things that must not change throughout in order for the experiment to be valid (fair). they are the same between the control group and the experimental group.
2. in a controlled experiment, change only _________ variable at a time.

important in a valid experiment.

Explanation:

Question 5

In experimental design (a key concept in Natural Science, especially in fields like Biology, Chemistry, Physics when conducting experiments), controlled variables (also called constants) are kept unchanged across control and experimental groups to ensure a fair test. These variables are controlled so that the effect of the independent variable on the dependent variable can be accurately measured.

In a controlled experiment (a fundamental practice in scientific experimentation, relevant to Natural Science subfields), the principle is to change only one independent variable at a time. This allows the experimenter to isolate the effect of that variable on the dependent variable, as changing multiple variables would make it impossible to determine which variable caused the observed change in the dependent variable.

Answer:

controlled

Question 6