Microwaves produce heat in food by
◦ penetrating the food substance, and causing it to cook from the inside out.
◦ combining with water molecules in the food, increasing their kinetic energy, and thus creating heat.
◦ interacting with electronically polarized molecules in the food, causing them to rotate, and produce heat by friction.
◦ being absorbed by the fats and sugars in the food, causing them to heat rapidly because of their relatively low specific heats.