Heat and temperature are inter-related, but contrary to the belief of the society, they do not mean the same thing. The reason why the concept of heat and temperature are mixed up is because they are closely related in real life. Thus, if heat is added to something, its temperature goes up and If the temperature is reduced heat is taken away. Recognizing the distinction between these two seemingly identical quantities leads to a clearer understanding of the world around us. Heat has different effects on matter, such as change in volume, change in temperature change and change in state of matter. In this section, the first two effects have given emphasis. Moreover, you will look at the different thermometers, the different temperature measuring scales and inter-conversion between them, and gas laws.