* Chemical Change: Involves the formation of new substances with different chemical properties.
* Physical Change: Alters the form or appearance of a substance but not its chemical composition.
How a Car Battery Works:
A car battery uses a chemical reaction between lead plates and sulfuric acid. As the battery discharges:
* Lead sulfate is formed: This is a new substance with different chemical properties than the original lead and sulfuric acid.
* Energy is released: This energy powers the car's electrical system.
Key Indicators of a Chemical Change:
* Formation of a new substance: In this case, lead sulfate.
* Energy change: The battery releases energy as it discharges.
Therefore, the process of a car battery running down involves a chemical change.
