A substance undergoes a chemical change. The result is a new substance with new properties. However, when a substance undergoes a physical change, it is often reversible. The substance has new physical properties, but its chemical properties do not change. Based on your observations of the combinations of salt and water as compared to baking soda and vinegar, which reactant went through a chemical change? Use evidence to explain your choice.

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