Which of the following describes a critical component of a “fair test”?
a fair test should include several confounders.
a fair test will always support the scientist’s hypothesis.
a fair test should have a specific methodology for data collection.
a fair test should study something previously not understood, like an aspect of human behavior.

A fair test should have a specific methodology for data collection.

Explanation:

A fair test should be carried out without prejudice or bias. This means that the outcome would be accepted and not influenced by the researcher. To achieve this, there must be a specific methodology for data collection to avoid any form of influence.

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons

the answers would be

the first one and the second one