what is calories & what is fat ?

[Lucky Star]

10 point for brief answer.

[schoney]

Calories is energy. To figure out the calories of a certain food, they actually dry it out completely to see how much energy is in it.

Fat is insulation that animals make from stored energy (calories) that they don't use right away.

[Ferrets]

calorie is a unit of energy
In most fields, its use is archaic, and the SI unit of energy, the joule, has become accepted. However, it remains in common use as a unit of food energy.

Fats consist of a wide group of compounds that are generally soluble in organic solvents and largely insoluble in water. Chemically, fats are generally triesters of glycerol and fatty acids. Fats may be either solid or liquid at normal room temperature, depending on their structure and composition.

calorie is energy that you eventually use, you gain calories from eating, most food have calories but if you don't use it, it will become fats (stored as fat) which will be harder to burn

[Lyn]

calories comes from a gram
fat 1 gram = 9 calories
carbohydrate 1 gram = 4 calories
protein 1 gram = 4 calories