Calorie and kilocalorie are units used to measure what property?

• A. Pressure
• B. Volume
• C. Temperature
• D. Energy

Answer: (D)

Calorie and kilocalorie express energy. A calorie is the amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius at standard pressure; a kilocalorie is 1000 calories and is the energy content commonly referred to in foods. These units quantify how much energy is available or required, not a property like pressure, volume, or temperature themselves (which have their own units). In nutrition, kilocalories tell you how much energy a food can provide. So the correct idea here is that these units measure energy.