The fire releases radient energy in the form of infared waves which makes your hands get warmer.This is called radiation and it happends in all states of matter.
The metal of the pot is hot it is proboubly because metal is a heat conducter.The pot that has the metal spoon in it is hot this causes the spoon to be hot because the particles collieded. This is the opposite of heat insalaters wich are like wood and plastic materials wich take a long time to heat up and cool down. Conduction is the transfer of heat energy in solids.
The fire under the pot causes the liquid particles to heat up and this causes them to rise and become lighter until they become a gas.convection is the transfer of heat energy in fluids which occurs through particles that move in circles called convection currents. Click To Edit