Question

Which of these describes something that would increase the validity of an experiment?

A) having no dependent variables

B) having a single experimental group

C) having other scientists repeat your results

D) having to enter your experiment in a science fair

Answer 1

B

Step-by-step explanation:

Most experiments require a control group AND one experimental group.

Answer 2

C) having other scientists repeat your results

Step-by-step explanation:

The fact that other scientists repeat an experiment will increase the validity of it, since the probability of an error will be lower due to a bad measured coming from a single scientist.

For example, in the release of the first image of a black hole. Some different groups of scientists treated the data using different methods to get that image, and all of them reached the same result.