When we say hot and cold, we are making a subjective observation. What is cold to one may be hot to another.$^0$
Heat, however, is not the same as temperature. It is defined as: The form of energy that is transferred from two objects or systems with different temperatures.$^0$
Thus, heat is directly proportional to temperature difference. It would also follow that when the temperature difference is 0, as is the heat.$^0$
Temperature is the average kinetic energy of the particles.$^0$
Temperature is measured in Kelvin. 1 degree Kelvin is equal to 1 degree Celsius + 273.$^0$
However, Kelvin and Celsius are the same size. As it, if you add 5 degree Celsius, you would add 5 degree Kelvin. In other words, $\Delta T$ can be measured in either Kelvin or Celsius, it doesn’t matter.$60$
0 degrees kelvin is called absolute 0. This is when the average kinetic energy of a substance is 0. This is considered impossible to reach.
There are 3 types of heating:$^0$
Conduction is when heat is transferred through the vibration of particles. The particles don’t actually move.$^0$
Convection is the cycle of particles with high temperature move up while the particles with low temperature move down.$^0$
Radiation is the heat that is transferred through the emission of waves. Electromagnetic waves are an example.$^0$