Hi I am studying for my PHYS 1000 exam and I came across a problem where my teacher and the book had differing answers. However, neither source explained why to back up their reasoning to support their answer. Below it appears that they agree on the volume and the mass but disagree on the density.

The question is: What happens to the volume of a loaf of bread that is squeezed? The mass? The density? Teacher: In the order asked, they are: decreased, unchanged, decreased.

Textbook: A squeezed loaf of bread has reduced volume, the same mass, and increased density. Could you please explain who is correct and give the reasoning why?