1.cal·o·rieˈkal(ə)rē/nounnoun: calorie; plural noun: calories; noun: cal.either of two units of heat energy.the energy needed to raise the temperature of 1 gram of water through 1 °C (now usually defined as 4.1868 joules).noun: small calorie; plural noun: small caloriesthe
energy needed to raise the temperature of 1 kilogram of water through 1
°C, equal to one thousand small calories and often used to measure the
energy value of foods.noun: large calorie; plural noun: large calories
2. calories vary throughout foods for sure, because different foods are made of different content.
3. From my experience, i have noticed that the foods with the highest calorie content are usually more heavily processed. They are often times also more fatty things such as: pastries, fried things, and definately have high sugar content.
