heat

Heat is the energy that makes things feel hot. It is caused by the movement of tiny particles called molecules. When molecules move faster, they have more energy and they feel hotter.

Heat can be transferred from one object to another by conduction, convection, or radiation. Conduction is the transfer of heat through direct contact. Convection is the transfer of heat through a liquid or gas. Radiation is the transfer of heat through electromagnetic waves.

Heat is important for many things in our lives. It is used to cook food, heat our homes, and generate electricity. It is also used in many industrial processes.

The sun's heat made the sand hot.