Final answer:
A physical change is a change in the state or form of matter without altering its chemical composition, while a chemical change involves a rearrangement of atoms and the formation of new substances.
Step-by-step explanation:
In terms of what happens to the particles, a physical change refers to a change in the state or form of matter without altering its chemical composition. This means that the particles remain the same, only their arrangement or state changes. An example of a physical change is melting ice.
On the other hand, a chemical change involves a rearrangement of atoms and the formation of new substances with different chemical compositions. In this case, the particles are broken down and reorganized to form new particles with different properties. One example of a chemical change is the burning of wood.
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