Science Olympiad flashcards for Forensics/Crime Busters Learn with flashcards, games, and more for free.. - Identifying Four Unknown Powder Substances. I. ABSTRACT. In the experiment, there were four different unknown powder substances and .This chemistry lab is found in Lesson 1 of the Friendly Chemistry course. To learn more about Friendly Chemistry .Students will be able to identify and control variables to develop a test to identify an unknown powder. Students will be able to explain that a substance reacts .