A standard slice of bread weighs approximately 1 ounce. Five quarters together also weigh about 1 ounce, as a single quarter weighs 5.67 grams, and one ounce is equal to 28.35 grams.
A fluid ounce is different from an ounce in weight. Fluid ounces are a measurement of volume, such as the ounces of a bottle of soda, while regular ounces measure weight or mass, which is used to measure foods like pasta. Most items do not have equal measurements in weight ounces and fluid ounces; surprisingly, 1 ounce of water in weight is the same as 1 ounce of water in fluid ounces.