Concept of heat & energy

Do we think what is heat, why we feel worm when we touch a hotter subtance?
Heat is a form of energy- energy of molecules moving. The faster they move, hotter it is. When we heat somthing then then the movement (vibration) of molecules in subtance increases. This vibration gives amount of heat.
When we put our hand over a heater, warmth we feel is actually an assualt by billions of fast moving air molecules, spurred along by even faster moving molecules in heater. We measure how hot is by its temperature. Temperature is degree of heat but not same as heat. Heat is combined enegy of all molecules where as temperature is measure of how fast molecules are moving.
Heat moves in three ways conduction, convection & radiation. Conduction involves heat spreading from hot areas to cold areas by direct contact, as moving particles collide onto each other. Convection is as when warm air or water rises as its expands & gets lighter. Radiation is heat rays, invisible rays, of light.
Temperature is measured with thermometer. It is measured in centigrade & farenheit units.

Energy, in general, is capacity to make things happen. We have energy to do something means we have capacity to do that work. Scientifically, it is capacity to do work. It takes various forms. Energy can neigher be created nor be distroyed, means it can be only converted into other form. The total energy of universe is constant.