1)Yeast is the microbe is used to extract ethanol from fruit juices and sugar molasses.

2)Ethanol fermentation, also called alcoholic fermentation, is a biological process which converts sugars such asglucose, fructose, and sucrose into cellular energy, producing ethanol andcarbon dioxideas by-products.

3)Example of beverages obtained by microbial fermentation are wine, beer, chikokivana, whisky, moutai, malt whisky etc.

Examples of chemicals obtained by microbial fermentation are cellulose, etahnol, lactic acid, acetic acid, riboflavin etc.

4)Extensive properties, such as mass and volume, depend on the amount of matter being measured. Intensive properties, such as density and color, do not depend on the amount of the substance present. Physical properties can be measured without changing a substance's chemical identity.

It is important to understand physical properties because:-(i)They help classify matter and recognize different things like the difference between toxins and something harmless. (ii)Physical properties can also be used to determine the freezing or boiling pont of an object(it can determine the freezing point of water).