Conductivity

• Conductivity refers to the ability of a substance to allow matter or energy to pass through it and transmit the matter or energy to another substance. Conductivity levels can be measured by the amount of original matter or energy which is passed through. A high level will allow almost all of the matter or energy to be transferred, and low level will cause some or most of the original matter or energy to be lost.
  
  

Receptivity

• Receptivity is the ability of a substance to receive or absorb matter or energy. A high level of receptivity means the substance receives or absorbs nearly all or the matter or energy; a low level means it takes on little to none of the new substance or energy.
  
  

Differences

• Receptivity and conductivity in opposite manners. A material that has the properties of high conductivity and low resistivity is known as a conductor. It allows things to pass through it easily and is also receptive---it will absorb easily. Metal is a usually a good conductor of heat and sound. Material that has the properties of high resistivity and low conductivity is known as an insulator. It does not allow things to pass through it and is not highly receptive. Glass is a good insulator for liquids and solids.