Final answer:
The statement is false; a substance that undergoes a chemical change is transformed into a different substance with new properties, which is indicative of a chemical reaction.
Step-by-step explanation:
The question posed deals with a basic concept in chemistry: distinguishing between physical changes and chemical changes. When a substance undergoes a chemical change, it is transformed into one or more different substances. This involves a rearrangement of atoms to create new substances with different properties, a process represented by a chemical reaction. Therefore, the statement that a substance undergoing a chemical change is still the same substance after the change is False.
An example of this is when hydrogen and oxygen react chemically to form water. Before the reaction, we have two gases, and after the reaction, a liquid substance is formed with entirely different properties. This illustrates a chemical change as we have new products with different properties compared to the reactants.
Physical changes, on the other hand, only alter the appearance or state of a substance without changing its molecular structure. For example, melting ice into water or stretching gold into foil are physical changes as they do not produce new substances.