Heat transfer occurs through conduction, convection, and radiation, impacting substances differently based on their states and properties. Conduction involves heat transfer via molecular vibrations in solids, while convection occurs in fluids (liquids or gases) through the motion of heated molecules. Radiation, distinct from the other two, requires no medium, transferring heat as electromagnetic waves or energy packets. Specific heat is a measure of the heat needed to raise a substance’s temperature, with water having a notably high specific heat. Joseph Black's concept of latent heat describes the energy needed for phase changes without temperature alteration. These principles underlie various phenomena, including atmospheric heating and the operation of common devices like electric kettles.