passage: Conduction is the transfer of thermal energy .
  It occurs between objects or substances that are touching .
  Thermal conductors are materials that are good conductors of heat .
  Thermal insulators are materials that are poor conductors of heat .
  Both conductors and insulators have important uses .
  Convection is the transfer of thermal energy .
  This occurs as particles move within a fluid .
  The fluid may be a liquid or a gas .
  The particles within the fluid transfer energy by moving from warmer to cooler areas .
  They move in loops .
  These loops are called convection currents .
  Radiation is the transfer of thermal energy by waves .
  These waves can travel through empty space .
  When the waves reach objects , the heat is transferred to the objects .
  Radiation is how the Sun warms the Earths surface .
query_and_answer: What is the difference between a thermal conductor and a thermal insulator ? || Insulators conduct heat while conductors do not conduct heat
evidences: Thermal conductors are materials that are good conductors of heat . Thermal insulators are materials that are poor conductors of heat .