Which statement correctly describes a physical change?

a) involves breaking and creating chemical bonds but not changing a phase

b) may involve a change in phase but does not involve a change in the molecular structure

c) may involve converting two or more substances into new substances

d) involves changes at the molecular level

e) involves energy transfer and change in color

The statement that correctly describes a physical change is may involve a change in phase but does not involve a change in the molecular structure. The answer is letter B.

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.