* Physical Changes: Involve changes in the form or appearance of a substance, but not its chemical composition. Examples include:
* Melting (solid to liquid)
* Freezing (liquid to solid)
* Boiling (liquid to gas)
* Condensation (gas to liquid)
* Sublimation (solid to gas)
* Deposition (gas to solid)
* Chemical Changes: Involve the formation of new substances with different chemical properties. Examples include:
* Burning
* Rusting
* Cooking
Why melting ice is a physical change:
* Chemical composition remains the same: Water (H₂O) in the ice cap simply changes its state from solid to liquid. The molecules of H₂O remain the same.
* No new substances are formed: The ice cap doesn't transform into something chemically different like a new compound.
Let me know if you have other questions!
