Physical or Chemical Changes Worksheet - FreeSchool Publishing - Free Printable

To solve this, we need to decide if each example is a Physical Change (P) or a Chemical Change (C).

Quick Rule:
* Physical Change (P): The substance stays the same. It might change shape, size, or state (like melting or freezing), but you can often get it back to how it was. No new stuff is made.
* Chemical Change (C): A new substance is created. You usually see signs like burning, rusting, bubbling, bad smells, or color changes that you can't easily reverse.

Let's go through them one by one:

1. Water evaporating: Water turns into gas, but it’s still water. You can condense it back. -> P
2. Lighting a match: The wood burns and turns into ash and smoke. You can’t un-burn it. -> C
3. Baking a cake: The ingredients mix and cook to become something new. You can’t turn a cake back into eggs and flour. -> C
4. Butter melting: Solid butter becomes liquid butter. It’s still butter. -> P
5. Making toast: The bread burns slightly and changes texture/taste. It’s a chemical reaction from heat. -> C
6. Molding clay: You just change the shape of the clay. It’s still clay. -> P
7. Cutting paper: You have smaller pieces of paper, but it’s still paper. -> P
8. A nail rusting: Iron reacts with oxygen to make rust (a new substance). -> C
9. Ripping your jeans: The fabric is torn, but it’s still denim. -> P
10. Water freezing: Liquid water turns to solid ice. It’s still H2O. -> P
11. Wood burning: Wood turns to ash and smoke. New substances are formed. -> C
12. Milk going sour: Bacteria change the milk into a different substance with a bad smell. -> C
13. Sand and dirt mixing: They are just sitting next to each other. You could pick them apart. -> P
14. Smashing a rock: It’s just broken into smaller rocks. Still rock material. -> P
15. Breaking an egg: The shell breaks, but the inside is still egg. (Note: Cooking an egg would be chemical, but just breaking the shell is physical). -> P
16. Making rock candy: Sugar dissolves in water and then crystallizes again. It’s still sugar. -> P
17. Digesting food: Your body uses chemicals to break food down into energy and waste. New substances are made. -> C
18. Chopping an apple: You cut it into slices. It’s still apple. -> P
19. Carving a pumpkin: You remove parts of the pumpkin, but the remaining part is still pumpkin. -> P
20. Fireworks exploding: Explosions create light, heat, and smoke. New chemicals are formed. -> C
21. Baking soda volcano: The baking soda and vinegar react to make bubbles (gas). A new substance is created. -> C
22. Banana turning brown: This is oxidation (rotting/ripening). The fruit is changing chemically. -> C

Final Answer:
1. P
2. C
3. C
4. P
5. C
6. P
7. P
8. C
9. P
10. P
11. C
12. C
13. P
14. P
15. P
16. P
17. C
18. P
19. P
20. C
21. C
22. C