* Physical Properties: These are characteristics that can be observed or measured without changing the substance's chemical composition. They describe the substance's appearance, texture, and how it behaves under certain conditions.
* Melting Point: The temperature at which a solid substance changes into a liquid. This is a physical change because the chemical makeup of the substance remains the same.
* Boiling Point: The temperature at which a liquid substance changes into a gas. Again, this is a physical change as the chemical composition remains unchanged.
Key Points:
* Both melting and boiling points are intensive properties meaning they don't depend on the amount of the substance present.
* These properties can be used to help identify and characterize different substances.
Let me know if you have any other questions!
