[PDF] Take a Guess - sciencespot (2) Drops on a Penny lab Introduction - I pass out the lab materials and safety goggles. We discuss the directions and safety rules that relate to this experiment (see list below). Students must first perform a control test with the plain penny before coating the penny in the testing liquid (soap). Penny Lab Scientific Method Examples Flashcards | Quizlet Start studying Penny Lab Scientific Method Examples. Learn vocabulary, terms, and more with flashcards, games, and other study tools.