Looking at the image, we see a grid of 12 illustrated activities, each labeled with a phrase. The task is likely to identify which of these activities involve chemical changes — meaning the substance itself changes into something new, not just its shape or state.
Let’s go through each one:
1.
Breaking a window – Glass breaks, but it’s still glass. Physical change.
2.
Baking a cake – Ingredients mix and react with heat to form a new substance (cake). Chemical change.
3.
Slicing bread – Bread is cut, but still bread. Physical change.
4.
Crushing a soda can – Can is flattened, but still metal. Physical change.
5.
Frying an egg – Heat changes the egg’s proteins; you can’t un-fry it. Chemical change.
6.
Melting ice – Ice turns to water, but it’s still H₂O. Physical change.
7.
Using batteries – Batteries produce electricity through chemical reactions inside. Chemical change.
8.
Exploding fireworks – Fireworks burn and explode, creating light, sound, and new gases. Chemical change.
9.
Burning fire – Wood turns to ash and smoke; new substances formed. Chemical change.
10.
Crashing cars – Metal bends and breaks, but still metal. Physical change.
11.
Rusting chains – Iron reacts with oxygen to form rust (iron oxide). Chemical change.
12.
Chopping wood – Wood is cut into pieces, but still wood. Physical change.
So, the chemical changes are:
- Baking a cake
- Frying an egg
- Using batteries
- Exploding fireworks
- Burning fire
- Rusting chains
That’s 6 total.
Final Answer:
6
Parent Tip: Review the logic above to help your child master the concept of physical change and chemical change worksheet.
