Arthur paints his blue bike green. When his friend sees it, she thinks he got a new bike. How can Arthur explain to his friend that his bike is not new?

Question

Responses

Arthur can tell her a chemical change happened; the atoms from the bike rearranged when it was painted
Arthur can tell her a chemical change happened; the atoms from the bike rearranged when it was painted

Arthur can tell her a physical change happened; changing the color of the bike changes the bikes chemical identity
Arthur can tell her a physical change happened; changing the color of the bike changes the bikes chemical identity

Arthur can tell her a chemical change happened; every color change is a chemical change
Arthur can tell her a chemical change happened; every color change is a chemical change

Arthur can tell her a physical change happened; changing the color of the bike does not change the chemical identity of the bike

Answer 1

The best way for Arthur to explain to his friend that his bike is not new is to say:

Arthur can tell her a physical change happened; changing the color of the bike does not change the chemical identity of the bike.

This response correctly identifies the process of painting as a physical change, where the bike's color is altered without changing its fundamental properties. The bike remains the same; it's just been painted a different color.