\u2192 Heat is a form of energy that leads to the sensations of hotness or coldness.<\/p>\n
\u2192 Temperature is the degree of hotness and coldness of a body.<\/p>\n
\u2192 Thermometer is used to measure temperature.<\/p>\n
\u2192 The S.I. unit of temperature is \u00b0C.<\/p>\n
\u2192 The most common liquid for a thermometer is mercury.<\/p>\n
\u2192 The main sources of heat are (0 Fire (ii) Sun (iii) Electricity.<\/p>\n
\u2192 Those substances which can easily catch fire are called inflammable substances.<\/p>\n
\u2192 Those substances which are fire resistant are called non-inflammable substances.<\/p>\n
\u2192 The fixed temperature at which freezing of liquid occurs is known as freezing point.<\/p>\n
\u2192 The temperature at which vapourisation occurs is known as the boiling point.<\/p>\n
\u2192 Substances through which heat is easily conducted are called good conductors e.g. silver, gold, copper etc.<\/p>\n
\u2192 Substances through which heat is not easily conducted are called Insultors.<\/p>\n
\u2192 Radiation is the process of transfer of heat from a hot body to a cold body without affecting the intermediate medium<\/p>\n