What is a calorie? Empty calories, give examples.

A calorie is a unit of energy.

"In human nutrition, the term empty calories applies to foods and beverages composed primarily or solely of sugar, fats or oils, or alcohol-containing beverages. These supply food energy but little to no other nutrition in the way of vitamins, minerals, protein, fiber, or essential fatty acids."- Wikipedia

be confident on yourself. ignore such fools and move on ; )

answer///cannot be totally predicted;