Question

these can be observed without changing the substance. they include things like appearance, texture, color, odor, melting point, boiling point, density, and solubility
physical properties
chemical properties
these require that the substance changes into another substance. examples include chemical stability, heat of combustion, flammability, oxidation states, and toxicity
physical properties
chemical properties
a scientific law is
a checklist of steps for experimentation
a summary or equation that has been repeated endlessly with experimentation
a long explanation of how things work that has been tested again and again

Explanation:

Physical properties can be observed without changing the substance, like appearance and melting - point. Chemical properties require the substance to change into another, such as flammability. A scientific law is a summary or equation repeatedly verified by experimentation.

Answer:

1. Physical Properties
2. Chemical Properties
3. A summary or equation that has been repeated endlessly with experimentation