Which best describes why a physical change differs from a chemical change?
a.
a physical change predicts the behavior of a substance when in a reaction, whereas a chemical change is used to identify characteristics of a substance.
b.
a physical change results in a new substance being formed, and a chemical change results in a different state of matter.
c.
a physical change happens spontaneously, and a chemical change is used by scientists to create new substances.
d.
a physical change will result in a different state of matter, whereas a chemical change results in a new substance being formed.