Physical and Chemical Changes online worksheet for 8 - Free Printable
Educational worksheet: Physical and Chemical Changes online worksheet for 8. Download and print for classroom or home learning activities.
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Step-by-step solution for: Physical and Chemical Changes online worksheet for 8
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Show Answer Key & Explanations
Step-by-step solution for: Physical and Chemical Changes online worksheet for 8
You're correct — this worksheet asks you to classify each term as either a Physical Property, Chemical Property, Physical Change, or Chemical Change, based on the definitions provided.
Let’s go step by step using the definitions:
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- Physical Property: Can be detected with the 5 senses or measured. *Describes something* (e.g., color, mass, temperature).
- Chemical Property: Describes how a substance will react (e.g., flammable, combustible).
- Physical Change: A change in physical property — *no new substance is created*. Often ends in “ing”.
- Chemical Change: Substance reacts and makes a *new substance* — identity changes. Also often ends in “ing”.
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## ✔ Let's Classify Each Item:
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1. flammable → This describes how a substance *will react* (burn).
→ Chemical Property
2. mixing → This is an action — combining substances without changing identity (like mixing salt and water).
→ Physical Change
3. tarnishing → This is a reaction (usually with air/sulfur) that forms a new substance (e.g., silver tarnish = silver sulfide).
→ Chemical Change
4. combustible → Describes ability to burn — how it will react.
→ Chemical Property
5. 88 degrees → Measurable temperature — a physical characteristic.
→ Physical Property
6. bread molding → Mold grows and breaks down bread — new substances formed (fungi, decay products).
→ Chemical Change
7. molding clay → Changing shape — no new substance.
→ Physical Change
8. melting → Solid to liquid — state change, no new substance.
→ Physical Change
9. density → Measurable property (mass/volume).
→ Physical Property
10. rotting → Decomposition — organic matter breaks down into new substances.
→ Chemical Change
11. rusting → Iron + oxygen → rust (iron oxide) — new substance.
→ Chemical Change
12. freezing → Liquid to solid — state change.
→ Physical Change
13. cutting → Changing size/shape — no new substance.
→ Physical Change
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14. sour tasting → Detected by taste — physical property.
→ Physical Property
15. milk souring → Bacteria ferment lactose → lactic acid — new substance.
→ Chemical Change
16. decomposing → Breaking down into simpler substances — chemical change.
→ Chemical Change
17. solid phase → State of matter — measurable/observable.
→ Physical Property
18. reacting → General term for chemical change — implies new substance.
→ Chemical Change
19. 456 grams → Measured mass.
→ Physical Property
20. fragile → Describes how easily it breaks — observable trait.
→ Physical Property
21. bitter → Taste — sensed.
→ Physical Property
22. purple → Color — observed.
→ Physical Property
23. bleaching → Chemical process that removes color — often involves oxidation (new substances).
→ Chemical Change
24. evaporating → Liquid to gas — state change.
→ Physical Change
25. 432 ml → Measured volume.
→ Physical Property
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## 📝 Final Answer Key:
> 5, 9, 14, 17, 19, 20, 21, 22, 25
> 1, 4
> 2, 7, 8, 12, 13, 24
> 3, 6, 10, 11, 15, 16, 18, 23
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✔ You can now fill in the blanks accordingly!
Let me know if you’d like this formatted as a table or printable answer sheet!
Let’s go step by step using the definitions:
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🔑 Key Definitions Recap:
- Physical Property: Can be detected with the 5 senses or measured. *Describes something* (e.g., color, mass, temperature).
- Chemical Property: Describes how a substance will react (e.g., flammable, combustible).
- Physical Change: A change in physical property — *no new substance is created*. Often ends in “ing”.
- Chemical Change: Substance reacts and makes a *new substance* — identity changes. Also often ends in “ing”.
---
## ✔ Let's Classify Each Item:
---
Left Column (Items 1–13):
1. flammable → This describes how a substance *will react* (burn).
→ Chemical Property
2. mixing → This is an action — combining substances without changing identity (like mixing salt and water).
→ Physical Change
3. tarnishing → This is a reaction (usually with air/sulfur) that forms a new substance (e.g., silver tarnish = silver sulfide).
→ Chemical Change
4. combustible → Describes ability to burn — how it will react.
→ Chemical Property
5. 88 degrees → Measurable temperature — a physical characteristic.
→ Physical Property
6. bread molding → Mold grows and breaks down bread — new substances formed (fungi, decay products).
→ Chemical Change
7. molding clay → Changing shape — no new substance.
→ Physical Change
8. melting → Solid to liquid — state change, no new substance.
→ Physical Change
9. density → Measurable property (mass/volume).
→ Physical Property
10. rotting → Decomposition — organic matter breaks down into new substances.
→ Chemical Change
11. rusting → Iron + oxygen → rust (iron oxide) — new substance.
→ Chemical Change
12. freezing → Liquid to solid — state change.
→ Physical Change
13. cutting → Changing size/shape — no new substance.
→ Physical Change
---
Right Column (Items 14–25):
14. sour tasting → Detected by taste — physical property.
→ Physical Property
15. milk souring → Bacteria ferment lactose → lactic acid — new substance.
→ Chemical Change
16. decomposing → Breaking down into simpler substances — chemical change.
→ Chemical Change
17. solid phase → State of matter — measurable/observable.
→ Physical Property
18. reacting → General term for chemical change — implies new substance.
→ Chemical Change
19. 456 grams → Measured mass.
→ Physical Property
20. fragile → Describes how easily it breaks — observable trait.
→ Physical Property
21. bitter → Taste — sensed.
→ Physical Property
22. purple → Color — observed.
→ Physical Property
23. bleaching → Chemical process that removes color — often involves oxidation (new substances).
→ Chemical Change
24. evaporating → Liquid to gas — state change.
→ Physical Change
25. 432 ml → Measured volume.
→ Physical Property
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## 📝 Final Answer Key:
Physical Properties:
> 5, 9, 14, 17, 19, 20, 21, 22, 25
Chemical Properties:
> 1, 4
Physical Changes:
> 2, 7, 8, 12, 13, 24
Chemical Changes:
> 3, 6, 10, 11, 15, 16, 18, 23
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✔ You can now fill in the blanks accordingly!
Let me know if you’d like this formatted as a table or printable answer sheet!
Parent Tip: Review the logic above to help your child master the concept of physical vs chemical changes worksheet.
