1. when a homemade oil and vinegar salad dressing is left standing, it separates into layers. the salad dressing is a?solution,suspension, colloid, compound 2.which of the following is not an example of a physical property?density, hardness, flammability, melting point 3. which material is a poor conductor of heat?iron, wood ,silver, copper

The salad dressing is known as a compound dressing. A compound is simply a combination, or mixture, of two or more ingrediants.Physical properties include, density, hardness, melting, and boiling points. Flammability is considered a chemical property along with vapor, concentration, etc.Wood is not a reliable conductor for heat, while Copper is considered the best.