20 examples of physical and 20 examples of chemical changes.
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Physical change
- Crushing a can
- Crushing a canMelting an ice cube
- Crushing a canMelting an ice cubeBoiling water
- Crushing a canMelting an ice cubeBoiling waterMixing sand and water
- Crushing a canMelting an ice cubeBoiling waterMixing sand and waterBreaking a glass
- Crushing a canMelting an ice cubeBoiling waterMixing sand and waterBreaking a glassDissolving sugar and water
- Crushing a canMelting an ice cubeBoiling waterMixing sand and waterBreaking a glassDissolving sugar and waterShredding paper
- Crushing a canMelting an ice cubeBoiling waterMixing sand and waterBreaking a glassDissolving sugar and waterShredding paperChopping wood
- Crushing a canMelting an ice cubeBoiling waterMixing sand and waterBreaking a glassDissolving sugar and waterShredding paperChopping woodMixing red and green marbles
- Crushing a canMelting an ice cubeBoiling waterMixing sand and waterBreaking a glassDissolving sugar and waterShredding paperChopping woodMixing red and green marblesSublimation of dry ice
- Crushing a canMelting an ice cubeBoiling waterMixing sand and waterBreaking a glassDissolving sugar and waterShredding paperChopping woodMixing red and green marblesSublimation of dry iceCrumpling a paper
chemical change
- Evolving bubbles or releasing gas
- Evolving bubbles or releasing gasAbsorbing or releasing heat
- Evolving bubbles or releasing gasAbsorbing or releasing heatChanging color
- Evolving bubbles or releasing gasAbsorbing or releasing heatChanging colorReleasing an odor
- Evolving bubbles or releasing gasAbsorbing or releasing heatChanging colorReleasing an odorInability to reverse the change
- Evolving bubbles or releasing gasAbsorbing or releasing heatChanging colorReleasing an odorInability to reverse the changePrecipitation of a solid from a liquid solution
- Evolving bubbles or releasing gasAbsorbing or releasing heatChanging colorReleasing an odorInability to reverse the changePrecipitation of a solid from a liquid solutionFormation of a new chemical species. This is the best and surest indicator. A change in the chemical properties of the sample may indicate a chemical change (e.g., flammability, oxidation state).
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