Heat and Energy

• The measure of degree of hotness of a substance is called its temperature.
• The device that is used to measure the temperature of a substance is called thermometer. 
• Thermometers are of two types - clinical (used for measuring temperature of human body) and laboratory (used for measuring temperature of common objects). 
• The temperature range of clinical thermometer is 37- 42 °C and that of laboratory thermometer is -10 ^oC to  +110 ^oC. The unit for temperature is °C. 
• The normal temperature of human body is 37 °C or 98.6 °F.
• There are three commonly scales used in temperature
• Celsius scale of temperature
• Fahrenheit scale of temperature 
• Kelvin scale of temperature
• Kelvin is the SI unit of temperature.         
• The SI unit of heat is joule (J)
• Other common …