Task: Identify the following properties as physical or chemical. Write P for physical and C for chemical.
#### Definitions:
-
Physical Properties: Characteristics of a substance that can be observed or measured without changing its chemical identity. Examples include color, density, melting point, boiling point, etc.
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Chemical Properties: Characteristics of a substance that describe its ability to undergo chemical reactions and change into different substances. Examples include flammability, reactivity with acids, etc.
#### List of Properties:
1. Blue color
2. Density
3. Flammability
4. Solubility
5. Reacts with acid
6. Luster
7. Sour taste
8. Melting point
9. Boiling point
10. Hardness
---
Solution:
1.
Blue color
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Property Type: Physical
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Reason: Color is an observable characteristic that does not involve a chemical change.
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Answer: P
2.
Density
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Property Type: Physical
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Reason: Density is a measurable property that describes the mass per unit volume of a substance, without altering its chemical composition.
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Answer: P
3.
Flammability
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Property Type: Chemical
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Reason: Flammability refers to the ability of a substance to burn, which involves a chemical reaction (combustion).
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Answer: C
4.
Solubility
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Property Type: Physical
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Reason: Solubility describes the ability of a substance to dissolve in a solvent, which is a physical process and does not involve a chemical change.
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Answer: P
5.
Reacts with acid
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Property Type: Chemical
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Reason: Reacting with an acid involves a chemical reaction, where new substances are formed.
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Answer: C
6.
Luster
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Property Type: Physical
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Reason: Luster refers to the way a substance reflects light, which is an observable physical characteristic.
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Answer: P
7.
Sour taste
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Property Type: Chemical
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Reason: Taste is related to the chemical interaction between the substance and taste receptors in the mouth.
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Answer: C
8.
Melting point
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Property Type: Physical
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Reason: The melting point is the temperature at which a solid turns into a liquid, which is a physical change (no chemical reaction occurs).
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Answer: P
9.
Boiling point
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Property Type: Physical
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Reason: The boiling point is the temperature at which a liquid turns into a gas, which is also a physical change.
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Answer: P
10.
Hardness
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Property Type: Physical
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Reason: Hardness is a measure of how resistant a material is to being scratched or deformed, which is a physical property.
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Answer: P
---
Final Answer:
```
1. P
2. P
3. C
4. P
5. C
6. P
7. C
8. P
9. P
10. P
```
Boxed Answer:
\[
\boxed{P, P, C, P, C, P, C, P, P, P}
\]
Parent Tip: Review the logic above to help your child master the concept of physical properties of matter worksheet.
