Question: Why do scientists use radioactive dating to date rocks?Scientists use radioactive dating because of the M and M lab, class averages and the parent and daughter isotopes. First, the M and M lab is evidence in proving why scientists use radioactive dating. Radioactive dating is similar to the M and M lab because of the landing of theM and M's. The M and M's that landed M side up were still radioactive, but the ones that landed M side down were not. The amount of M and M's that were still radioactive through each roll was about 1/2. Therefore, because the M and M lab can be linked to radioactive dating, this proves why scientists use radioactive dating to date rocks. Another piece of evidence is the M and M amount that stopped being radioactive. The percent amount after each roll went down by precisely half each roll. The M and M's that stopped being radioactive on the first rolls are called