Guide Questions: 1. Which liquid sample is a substance? Table 1: Boiling point of two liquid samples Temperature Observation while heating Samples Liquid A Liquid B 2. Which solid sample is a substance? Scenario 1: Melting point of two solid samples Appearance Observation while melting Samples 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. please answer it properly