- Glass is a kind of object
- Breaking down an object changes that object 's shape
- Therefore, breaking a glass changes the shape of the glass

- Breaking a glass changes the shape of the glass
- Shape is a kind of physical property
- So, breaking a glass changes the physical property of the glass

- Breaking a glass changes the physical property of the glass
- If something undergoes a physical change then the physical properties of that something will change
- So, breaking a glass is an example of a glass undergoing a physical change

So, breaking a glass is an example of a glass undergoing a physical change
Which of the following is an example of a physical change?
- Glass is a kind of object 
- Breaking down an object changes that object 's shape 
- Shape is a kind of physical property 
- If something undergoes a physical change then the physical properties of that something will change