* Heat is a form of energy.
* Heat flows from a body at higher temperature to a body at lower temperature.
* Temperature is the measure of hotness or coldness of a body.
* Temperature determines the direction of flow of heat between two bodies in thermal contact with each other.
* Temperature is measured with thermometer.
* Commonly used thermometric scales are Celsius (°C), Fahrenheit (°F), Kelvin (K), Reaumur (R) and Rankine (Ra).
* Relation between the temperatures of different scales is
here LFP (Lower fixed point) is the ice point at atmospheric pressure.
UFP (Upper fixed point) is the steam point at atmospheric pressure.
* Classification of Thermometers
