How do you describe four substances and their properties based on the changes that the substances undergo?

Answer 1

Substances can be classified based on their physical and chemical properties, which change during processes such as phase transitions or chemical reactions. For instance, ice (solid water) melts to form liquid water, demonstrating a physical change in state while retaining its chemical identity. When iron rusts, it undergoes a chemical change, resulting in iron oxide, which has different properties than elemental iron. Similarly, when sugar dissolves in water, it demonstrates a physical change where the sugar molecules disperse, altering the solution's properties without changing the sugar's chemical structure.