Students correct three physical/chemical property errors — flammability as physical, color as chemical, and density as chemical. Part B has four questions naming properties and classifying physical versus chemical. Part C has two questions listing iron's properties and explaining why boiling point is physical.
Correcting the most common property classification errors — especially flammability as physical — establishes the defining rule that chemical properties involve creating new substances through a reaction.
Style:
Properties of Matter
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
Flammability is a physical property because you can see a material catch fire.
Rewrite: Flammability is a chemical property because the material changes into a new substance when it burns.
2. Fix the sentence:
The color of a rock is a chemical property because you must test it in a lab.
Rewrite: The color of a rock is a physical property because you can observe it without changing the substance.
3. Fix the sentence:
Density is a chemical property because you need to measure both mass and volume.
Rewrite: Density is a physical property because measuring mass and volume does not change the substance.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. A physical property can be observed without changing the composition of a substance.
2. The ability of a substance to rust when exposed to oxygen is a chemical property.
3. Mass, volume, and color are all examples of physical properties.
4. A chemical property describes how a substance reacts with other substances.
Part C: Short Answer
Answer each question in one or two complete sentences.
1. Name two physical properties and two chemical properties of a piece of iron.
Two physical properties of iron are its silver color and its hardness. Two chemical properties are its ability to rust when exposed to moisture and its flammability at very high temperatures.
2. Why is boiling point considered a physical property and not a chemical property?
Boiling point is a physical property because when a liquid boils it changes state from liquid to gas but remains the same substance. No new substance is created, so it is not a chemical change.
Properties of Matter
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
Flammability is a physical property because you can see a material catch fire.
Rewrite: Flammability is a chemical property because the material changes into a new substance when it burns.
2) Fix the sentence:
The color of a rock is a chemical property because you must test it in a lab.
Rewrite: The color of a rock is a physical property because you can observe it without changing the substance.
3) Fix the sentence:
Density is a chemical property because you need to measure both mass and volume.
Rewrite: Density is a physical property because measuring mass and volume does not change the substance.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) A physical property can be observed without changing the composition of a substance.
2) The ability of a substance to rust when exposed to oxygen is a chemical property.
3) Mass, volume, and color are all examples of physical properties.
4) A chemical property describes how a substance reacts with other substances.
★ Part C: Short Answer
Answer each question in one or two complete sentences.
1) Name two physical properties and two chemical properties of a piece of iron.
Two physical properties of iron are its silver color and its hardness. Two chemical properties are its ability to rust when exposed to moisture and its flammability at very high temperatures.
2) Why is boiling point considered a physical property and not a chemical property?
Boiling point is a physical property because when a liquid boils it changes state from liquid to gas but remains the same substance. No new substance is created, so it is not a chemical change.
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15-20 minutes
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