Change, Change, Change!
No, No! Not this kind of change…
THIS KIND OF CHANGE!
Physical Change
•A physical change DOES NOT produce a newsubstance.
•Changes in state or phase are physical changes.
–Melting
–Freezing
–Vaporization (boiling, evaporation)
–Condensation
–Sublimation -----------→
–Dissolving
•The starting and ending materials of a physicalchange are the same, even though they may lookdifferent.
Examples of Physical Changes
•Examples of physical changes include crushinga can, melting an ice cube, breaking a bottle,salt water.
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Chemical Change
•A chemical change produces a newsubstance.
•A chemical change makes a substance thatwasn't there before and is often difficult toreverse.
Evidence a Chemical Change hasoccurred:
•Light
•Heat
•Color Change
•Gas Production (bubbles can count)
•Odor
•Sound
•Tarnishing
•Rusting
•Flammability
Examples of Chemical Changes
•Examples of chemical changes includecombustion (burning), cooking an egg, rustingof an iron pan, and oxidation of an apple.
Several examples inONE!
•Odor
•Color Change
•Gas
•Heat
