Science review sheet challenging students to classify examples like rusting and melting into physical or chemical categories.

Let's solve this step by step based on the definitions provided in the review section:

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Definitions Recap:

- Physical Property: Can be observed or measured without changing the substance’s identity (e.g., color, density, melting point).
- Chemical Property: Describes how a substance reacts with other substances (e.g., flammability, reactivity).
- Physical Change: A change in form or state that does not create a new substance (e.g., cutting, melting).
- Chemical Change: A change where a new substance is formed due to a chemical reaction (e.g., rusting, burning).

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Now, let's classify each item.

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Left Column: Physical Properties / Chemical Properties

1. flammable → Describes ability to burn → Chemical Property
2. mixing → Not a property; it's an action → Wait — actually, "mixing" is a process, but here it's likely referring to the *act* of mixing. But since it's listed under properties, perhaps it's a mistake? Actually, mixing is not a property — but if we consider "ability to mix", it might be physical. However, typically, mixing is a physical change, not a property. But since it's listed as a property, maybe it's meant to be "solubility"? But it says "mixing". Let's assume it's physical property because it doesn't involve a chemical reaction.
- But wait — mixing is more accurately a physical change. But it's in the "properties" column. So perhaps it's a mislabeling? Let's reconsider.

Wait — the two columns are:
- Physical Properties / Chemical Properties (left)
- Physical Changes / Chemical Changes (right)

So:
- 1–13: Choose between Physical Property or Chemical Property
- 14–25: Choose between Physical Change or Chemical Change

So let's go one by one.

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Left Column: 1–13 (Physical or Chemical Property)

1. flammable → Ability to burn → Chemical Property
2. mixing → This is an action, not a property. But if we interpret it as "can be mixed", it’s about physical combination → Physical Property (since no new substance forms)
3. tarnishing → Process of oxidation → Chemical Property (describes tendency to react)
4. combustible → Can burn → Chemical Property
5. 88 degrees → Temperature → Physical Property (measurable)
6. bread molding → This is a process → but it's listed as a property? That seems odd. Probably meant to be a change. But it's in the property column. Wait — "bread molding" is a chemical change, so it shouldn’t be a property. Maybe typo? Or perhaps it's "moldable"? No, it says "bread molding". Likely it's a chemical property — meaning the tendency to mold → Chemical Property
7. molding clay → Shaping clay → this is a physical change, but again, listed under properties. If it means "can be molded", then Physical Property
8. melting → This is a physical change, but listed under properties? Again, “melting” is a change. But if it's “melting point”, it would be a physical property. Here it just says “melting”. So probably Physical Property (as in, has a melting point)
9. density → Measurable → Physical Property
10. rotting → Decomposition → describes tendency → Chemical Property
11. rusting → Tendency to oxidize → Chemical Property
12. freezing → Change of state → but if it's "freezing point", it's a physical property. Here it's just "freezing" → likely Physical Property
13. cutting → Action → but if it's "can be cut", it's a physical property → Physical Property

Wait — but cutting is a physical change, not a property. So why is it in the "property" list?

This suggests that the terms may be ambiguous. But based on context and standard classification:

Let’s re-evaluate carefully.

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Re-classification:

#### 1–13: Physical or Chemical Property

1. flammable → Chemical Property (how it reacts)
2. mixing → Not really a property. But if interpreted as "miscibility", it's Physical Property
3. tarnishing → Chemical Property (reacts with air)
4. combustible → Chemical Property
5. 88 degrees → Temperature value → Physical Property
6. bread molding → Tendency to spoil via fungus → Chemical Property
7. molding clay → "Molding" implies shaping → if it's about malleability → Physical Property
8. melting → Melting point is a physical property → Physical Property
9. density → Physical Property
10. rotting → Biological decomposition → Chemical Property
11. rusting → Oxidation → Chemical Property
12. freezing → Freezing point → Physical Property
13. cutting → Cutting is a change, not a property. But if it's "can be cut", it's Physical Property (like brittleness)

But "cutting" is a change, not a property. So perhaps it's a mistake.

Alternatively, maybe some entries are mislabeled.

But let’s proceed with best judgment.

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Final Classification for Left Column:

| # | Term | Type |
|---|------------------|--------------------|
| 1 | flammable | Chemical Property |
| 2 | mixing | Physical Property (if miscibility) |
| 3 | tarnishing | Chemical Property |
| 4 | combustible | Chemical Property |
| 5 | 88 degrees | Physical Property |
| 6 | bread molding | Chemical Property |
| 7 | molding clay | Physical Property |
| 8 | melting | Physical Property |
| 9 | density | Physical Property |
|10 | rotting | Chemical Property |
|11 | rusting | Chemical Property |
|12 | freezing | Physical Property |
|13 | cutting | Physical Property (malleability/shapeability) |

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Right Column: 14–25 (Physical or Chemical Change)

14. sour tasting → This is a sensory observation, not a change. But "sour taste" could result from acid formation → but "sour tasting" is a physical property (taste). But it's in the changes column.

Wait — the right column is labeled: Physical Changes / Chemical Changes

So these are changes.

But "sour tasting" is not a change — it's a property.

Possibly a mislabeling.

Let’s look at each:

14. sour tasting → If it means "becoming sour", like milk turning sour → that’s a chemical change. So likely Chemical Change
15. milk souring → Definitely Chemical Change (lactic acid fermentation)
16. decomposing → Chemical Change (breakdown into new substances)
17. solid phase → This is a state, not a change → Physical Property, but it's in changes column. Perhaps it's "solidifying"? But it says "solid phase". So maybe it's Physical Change if it refers to becoming solid?
18. reacting → Chemical Change
19. 456 grams → Mass → Physical Property, but in changes column? Should be Physical Change only if mass changes? But "456 grams" is a measurement → not a change → probably Physical Property, but misplaced. But since it's in changes column, maybe it's a Physical Change (e.g., measuring mass during a change)? Unlikely. Probably a mistake. But if it's "changing mass", it's physical change? But it's just a number.

This suggests possible errors in labeling.

But let’s assume the intent:

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Right Column: 14–25 (Physical or Chemical Change)

14. sour tasting → Likely meant to be "becoming sour" → Chemical Change
15. milk souring → Chemical Change
16. decomposing → Chemical Change
17. solid phase → If it's "turning into solid", it's Physical Change (e.g., freezing)
18. reacting → Chemical Change
19. 456 grams → Measurement → Physical Property, but in changes column → probably Physical Change if it's a mass change? But it's just a number. Maybe it's a typo. Assume Physical Change (mass can change physically)
20. fragile → This is a physical property, not a change. But in changes column → maybe "breaking"? But it says "fragile". So likely Physical Property, but placed wrong. But if it's "becoming fragile", it's a change? Unlikely. Probably Physical Property, but since it's in changes column, maybe it's Physical Change (if it breaks)?
21. bitter → Taste → Physical Property
22. purple → Color → Physical Property
23. bleaching → Chemical process (e.g., removing color via oxidation) → Chemical Change
24. evaporating → Phase change → Physical Change
25. 432 ml → Volume → Physical Property, but in changes column → if volume changes, it's physical change? But it's just a number. So likely Physical Change (e.g., liquid evaporating)

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Given the confusion, let’s use logic:

Best Interpretation:

The left column (1–13): Properties
The right column (14–25): Changes

So:

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✔ Final Answers:

#### Left Column: Physical or Chemical Property

1. flammable → Chemical Property
2. mixing → Physical Property (assuming it means "can be mixed")
3. tarnishing → Chemical Property
4. combustible → Chemical Property
5. 88 degrees → Physical Property
6. bread molding → Chemical Property (tendency to mold)
7. molding clay → Physical Property (malleability)
8. melting → Physical Property (melting point)
9. density → Physical Property
10. rotting → Chemical Property
11. rusting → Chemical Property
12. freezing → Physical Property (freezing point)
13. cutting → Physical Property (if it means "can be cut")

> Note: "Cutting" is usually a change, but here it's listed under properties, so likely meant as "cuttable" → Physical Property

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#### Right Column: Physical or Chemical Change

14. sour tasting → likely meant as "becomes sour" → Chemical Change
15. milk souring → Chemical Change
16. decomposing → Chemical Change
17. solid phase → likely "solidifying" → Physical Change
18. reacting → Chemical Change
19. 456 grams → mass measurement → not a change, but if it's a change in mass, still Physical Change (e.g., evaporation) → Physical Change
20. fragile → property, but if it's "breaking", then Physical Change → assume Physical Change
21. bitter → taste → Physical Property, but in changes → possibly Physical Change if it's "becomes bitter" → Chemical Change (if due to reaction) → but "bitter" is a property. Likely Physical Change if it's a sensory change due to physical process? But better: Chemical Change if bitterness comes from new substances (like in spoiled food)
→ But "bitter" is a property, not a change. So likely Physical Change if it's "becoming bitter" → Chemical Change
22. purple → color → Physical Property, but in changes → if it's "turning purple", then Physical or Chemical? E.g., iodine vapor is purple → Physical Change; but if due to reaction, Chemical. But "purple" alone is Physical Property → but in changes column → likely Physical Change
23. bleaching → Chemical Change (oxidation)
24. evaporating → Physical Change
25. 432 ml → volume → Physical Property, but in changes → assume Physical Change (volume change)

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Final Answer Key:

#### Left Column:

1. Chemical Property
2. Physical Property
3. Chemical Property
4. Chemical Property
5. Physical Property
6. Chemical Property
7. Physical Property
8. Physical Property
9. Physical Property
10. Chemical Property
11. Chemical Property
12. Physical Property
13. Physical Property

#### Right Column:

14. Chemical Change
15. Chemical Change
16. Chemical Change
17. Physical Change
18. Chemical Change
19. Physical Change
20. Physical Change
21. Chemical Change (if "becomes bitter" due to chemical reaction)
22. Physical Change (if color change due to physical process)
23. Chemical Change
24. Physical Change
25. Physical Change

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✔ Summary Table:

| # | Term | Category |
|---|------------------|------------------------|
| 1 | flammable | Chemical Property |
| 2 | mixing | Physical Property |
| 3 | tarnishing | Chemical Property |
| 4 | combustible | Chemical Property |
| 5 | 88 degrees | Physical Property |
| 6 | bread molding | Chemical Property |
| 7 | molding clay | Physical Property |
| 8 | melting | Physical Property |
| 9 | density | Physical Property |
|10 | rotting | Chemical Property |
|11 | rusting | Chemical Property |
|12 | freezing | Physical Property |
|13 | cutting | Physical Property |
|14 | sour tasting | Chemical Change |
|15 | milk souring | Chemical Change |
|16 | decomposing | Chemical Change |
|17 | solid phase | Physical Change |
|18 | reacting | Chemical Change |
|19 | 456 grams | Physical Change |
|20 | fragile | Physical Change |
|21 | bitter | Chemical Change |
|22 | purple | Physical Change |
|23 | bleaching | Chemical Change |
|24 | evaporating | Physical Change |
|25 | 432 ml | Physical Change |

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✔ Explanation:

- Chemical Properties describe how a substance reacts (flammable, combustible, rusting, etc.).
- Physical Properties are observable without changing identity (color, density, melting point, etc.).
- Chemical Changes produce new substances (rusting, souring, decomposing).
- Physical Changes alter form but not identity (melting, cutting, evaporating).

Even though some terms are ambiguous (like "mixing", "sour tasting"), they are interpreted based on typical scientific usage.

Let me know if you'd like a printed version or explanation for any specific term!