Final answer:
Conductivity is a physical property of matter that refers to the ability of a substance to conduct electricity or heat. Conductors, such as metals, have high electrical conductivity, while insulators, such as rubber and plastic, have low electrical conductivity.
Step-by-step explanation:
Conductivity is a physical property of matter. It is the ability of a substance to conduct electricity or heat. In the context of electricity, substances that can conduct electricity are called conductors, while substances that cannot conduct electricity are called insulators. Examples of conductors include metals like silver and copper, which have high electrical conductivity, while examples of insulators include rubber and plastic, which have low electrical conductivity.