SThose that disputed the flat Earth theory countered the claim by observing that Christopher Columbus was able to sail around the Earth without falling off thcientific laws describe natural relationships that have been tested repeated

Scientific laws describe natural relationships that have been tested repeatedly with successful and or accurate predictions. Scientific laws span all the subject areas of natural science  which include:

Scientific Laws are based on empirical evidence.  They are not the same theories, hypotheses, and postulates even though they may be derived from the same.  Hypotheses and Postulates which are tested repeatedly by the use of experiments and are shown to be true go on to become Laws.

Example of laws are

When a Law fails to hold up in the face of new data of evidence, it can be rescinded.

Cheers

1.the evidene of the reaction

2.yes

3.yes