Is Assembling a Jigsaw Puzzle a Physical Change? Yes

Yes. Assembling a jigsaw puzzle is a physical change because:

• No New Substance: Cardboard/wood composition unchanged.
• Reversible: You can disassemble it completely.
• No Chemical Reaction: No bonds broken/formed; only spatial rearrangement.

Contrast: Chemical changes (burning, rusting, baking) create new substances with different properties. Puzzling is purely mechanical.