What are two physical properties that can you identify a substance?

A physical property is a characteristic of a substance that can be observed without changing the substance into a different substance.
Physical properties include density, color, boiling point, and freezing point.

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

The answer is c. 320 g