In the copper- planting solution lab placed copper pennies in vinger is an weak acid with hydrogen ions when you put the pennies in the vinger you should haev abserved small gas bubbles. what were these bubbles composed of and how did they form

Hydrogen gas

Acid + metal = salt and hydrogen gas

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