Launch lab for chapter 3-matter and changes. Lab demonstration to show chemical properties and reactions between substances. Zinc metal and hydrochloric acid are used. Each element and/or compound is described by observation of physical properties. Each is tested for flammability in separate tubes and noted. The acid is placed into the zinc and the reaction noted, the formation of a gas. The gas is tested with a burning splint and the reaction observed and noted. The formation of a flame with a popping explosion along with a liquid forming in the test tube wall is noted. Discussion of the results observed and products formed followed