In this skill we will learn the difference between physical and chemical properties of matter.
When physical properties are measured, the identity of the sample does not change.
When chemical properties are measured, the identity of the sample changes.
Examples
Hardness (ability to resist scratching) is a physical property because when an object is scratched it does not change the identity of an object.
Flamabillity (how easily a substance sets fire) is a chemical property because when an object burns it undergoes a chemical reaction and gets used up, meaning that the identity of the sample changes.
Big Ideas
In this skill we will learn the difference between physical and chemical properties of matter.
When physical properties are measured, the identity of the sample does not change.
When chemical properties are measured, the identity of the sample changes.
Examples
Hardness (ability to resist scratching) is a physical property because when an object is scratched it does not change the identity of an object.
Flamabillity (how easily a substance sets fire) is a chemical property because when an object burns it undergoes a chemical reaction and gets used up, meaning that the identity of the sample changes.
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When mass is measured, does it change the identity of the sample?
Yes
No
Is mass a chemical or physical property of matter?
Chemical Property
Physical Property
When hardness (abilty to resist scratching) is measured, does it change the identity of the sample?
Yes
No
Is hardness a chemical or physical property of matter?
Chemical Property
Physical Property
When melting point is measured, does it change the identity of the sample?
Yes
No
Is melting point a chemical or physical property of matter?
Chemical Property
Physical Property
When reactivity (how easily a substance chemically reacts with another substance, such as acid, to form a new substance) is measured, does it change the identity of the sample?
No
Yes
Is reactivity a chemical or physical property of matter?
Chemical Property
Physical Property
When corrosiveness (how easily a substance can cause chemical damage to another substance) is measured, does it change the identity of the sample?
Yes
No
Is corrosiveness a chemical or physical property of matter?
Physical Property
Chemical Property
When acidity (how easily a substance reacts with a base to produce a new substance and water) is measured, does it change the identity of the sample?
Yes
No
Is acidity a chemical or physical property of matter?
Chemical Property
Physical Property
When flammability (how easily a substance sets fire) is measured, does it change the identity of the sample?
Yes
No
Is flammability a chemical or physical property of matter?
