What is the difference between whiskey and beer?

Whiskey is a distilled alcoholic beverage made from fermented grain MASH, while beer is a fermented alcoholic beverage made from grains like barley, hops, water, and yeast. Whiskey has a higher alcohol content and is typically aged in barrels, giving it a stronger flavor, while beer is usually lower in alcohol content and has a wider range of flavors and styles.