1. Section 3.2—Properties of Matter
What properties are useful or not useful in an airbag?

2. Physical versus Chemical Properties
Physical Property
Chemical Property
Can be observed or tested without changing the atoms or molecules
In the process of observing or testing, the atoms or molecules are changed into different substance(s)

3. Intensive and Extensive Properties
Intensive Property
Extensive Property
Size of the sample doesn’t matter—you’d say a big piece and a small piece were the same with respect to this property
Size of the sample does matter—a big piece and a small piece would be different with respect to this property

4. Are the following properties are physical or chemical?
Let’s Practice
Flammability
Boiling point
Solubility
Malleability
Reactivity with oxygen
Example:
Are the following properties are physical or chemical?

5. Are the following properties are physical or chemical?
Let’s Practice
Flammability
Boiling point
Solubility
Malleability
Reactivity with oxygen
Chemical
Physical
Example:
Are the following properties are physical or chemical?

6. Are the following properties are intensive or extensive?
Let’s Practice
Mass
Volume
Color
Flammability
Texture
Example:
Are the following properties are intensive or extensive?

7. Are the following properties are intensive or extensive?
Let’s Practice
Mass
Volume
Color
Flammability
Texture
Extensive
Intensive
Example:
Are the following properties are intensive or extensive?