- ... when oxygen is mixed with a substance: Y, chemical
- ... when a boiling kettle releases water vapour: N, physical
- ... when you heat a substance and there is a colour change and a gas is given off: Y, chemical
- ... when something combines with oxygen and gives out a lot of heat energy: Y, chemical
- ... when a poker glows red hot in a fire: N, physical
- ... when ice cubes melt in a glass of water: N, physical
- ... when copper sulphate is heated and it changes from blue to white: Y, chemical
- ... when flour, milk and eggs are used to make a pancake: Y, chemical
- ... when iron oxide is heated with carbon to make iron: Y, chemical
- ... when sugar ferments to make alcohol: Y, chemical
- ... when salt is added to water to make salt solution: N, physical
- ... when wine turns sour after the bottle has been opened: Y, chemical
- ... when an iodine block is heated to give off a vapour: N, physical
- ... when a bonfire burns: Y, chemical
- ... when glow sticks give out light: Y, chemical
- ... when a battery powers a torch: Y, chemical
- (Example) When wood is cut into smaller pieces: N, physical
- (Example) When butter melts in a pan: N, physical
- (Example) When milk curdles: Y, chemical
- (Example) When baking soda reacts with vinegar: Y, chemical
Parent Tip: Review the logic above to help your child master the concept of physical vs chemical changes worksheet.
