Grade 9, U1-L5 Physical and chemical changes
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A physical change alters the size, shape, or state of a substance without changing its chemical identity, and can be reversed. A chemical change transforms one or more substances into different substances with new properties, as indicated by a color change, formation of a precipitate or gas, or release of heat or light, and cannot easily be reversed.
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Grade 9, U1-L5 Physical and chemical changes
- 2. Physical change = a change in the state or form of a substance without changing the identity of the substance
- 3. Clue #1: change in size, shape or form PHYSICAL CHANGEPHYSICAL CHANGE
- 5. Clue #2: change in state PHYSICAL CHANGEPHYSICAL CHANGE
- 7. Clue #3: the change is reversible PHYSICAL CHANGEPHYSICAL CHANGE
- 8. Chemical change = the alteration of a substance into one or more new substances with different properties
- 9. a chemical change is the transformation of one or more substances into new substances with new properties
- 10. CHEMICAL CHANGECHEMICAL CHANGE Clue #1: colour change
- 11. Clue #2: a precipitate forms
- 12. Clue #3: bubbles of gas are produced
- 13. Clue #4: heat or light are produced
- 14. Clue #5: the change is difficult to reverse CHEMICAL CHANGECHEMICAL CHANGE