Scenario 1: Melting point of two solid samples B. Both substances are white crystalline powder. They cannot determine Chef Matt and his assistant observed two solid samples: Solid A and Solid which is which, they heated the two sampies using an improvised melting! which is a substance and mixture just by looking at it. So, to distinguish dish. Both the two samples were heated at the same time and received an equal amount of heat. After a few minutes, they had observed that Solid A melts completely within a short period of time; while Solid B has portions that seem to be not melting. Guide Questions: 1. Which liquid sample is a substance? Table 1: Boiling point of two liquid samples Samples Temperature Observation while heating Liquid A Liquid B 2. Which solid sample is a substance? Scenario 1: Melting point of two solid samples Samples Appearance Observation while melting Solid A Solid B During boiling, the temperature of a mixture is different at different times. During melting, a mixture has portions that seem to be not melting.