- Scissors cutting paper: red (physical change - only shape changes, can be reversed in concept)
- Kettle boiling water: red (physical change - state change, can be reversed by cooling)
- Glass of soda with bubbles: blue (chemical change - carbonation involves chemical reaction, new substances formed)
- Torn paper: red (physical change - only shape changes, can be taped back)
- Bent metal rod: red (physical change - only shape changes, can be straightened)
- Glass of soda with bubbles (second instance): blue (chemical change - same as above)
- Frying egg: blue (chemical change - proteins denature, new substance formed, can't be reversed)
- Burning match: blue (chemical change - combustion, new substances formed, can't be reversed)
- Mixing ingredients in bowl: red (physical change - mixture, no new substance, can be separated)
- Campfire: blue (chemical change - combustion, new substances formed, can't be reversed)
- Toasting bread: blue (chemical change - Maillard reaction, new substances formed, can't be reversed)
- Broken glass: red (physical change - only shape changes, can be glued)
- Kettle with scale buildup: blue (chemical change - mineral deposits from reaction, new substance formed)
- Ice cube melting: red (physical change - state change, can be reversed by freezing)
- Crushed can: red (physical change - only shape changes, can be reshaped)
- Burnt toast: blue (chemical change - charring is chemical decomposition, can't be reversed)
- Stirring powder into liquid: red (physical change - dissolving, can be reversed by evaporation)
- Rotten banana: blue (chemical change - decomposition, new substances formed, can't be reversed)
- Fireworks: blue (chemical change - combustion and explosion, new substances formed, can't be reversed)
- Light bulb with filament: red (physical change - heating and glowing, no new substance, can be turned off)
Parent Tip: Review the logic above to help your child master the concept of chemical and physical changes worksheet.
