if an object touches something then one is exposed to that something & if a spoon is used to stir a liquid then that spoon is touching that liquid ->  if a spoon is used to stir a liquid, then the spoon is exposed to the liquid  if a spoon is used to stir a liquid, then the spoon is exposed to the liquid & soup is a kind of liquid ->  if a spoon is used to stir soup, the the spoon is exposed to the soup  if a spoon is used to stir soup, the the spoon is exposed to the soup & a metal spoon is used to stir the soup ->  the metal spoon is exposed to the soup  the metal spoon is exposed to the soup & metal is a thermal / thermal energy conductor ->  the metal spoon being exposed to the soup is an example of a thermal conductor being exposed to the soup  a metal spoon is used to stir the soup0 & a pan of soup is heated on a stove ->  the pan of soup will become hot  the pan of soup will become hot & a metal spoon is used to stir the soup1 & soup is a kind of substance ->  the pan of soup will become a source of heat  the metal spoon being exposed to the soup is an example of a thermal conductor being exposed to the soup & the pan of soup will become a source of heat & if a thermal conductor is exposed to a source of heat then that conductor will become hot / warm ->  the metal spoon in the soup will become hot  the metal spoon in the soup will become hot & if heat is transferred to an object , then the object will get hot -> heat in the soup transferring to the metal spoon causes the spoon to become hot