- A pencil is a kind of object
- Sharpening a pencil changes the shape of the pencil
- So, sharpening a pencil changes the shape of an object

- Paper is a kind of object
- Tearing paper changes the shape of the paper
- So, tearing paper changes the shape of an object

- Sharpening a pencil changes the shape of an object
- Tearing paper changes the shape of an object
- Therefore, sharpening a pencil and tearing paper both change the shape of the object

- Sharpening a pencil and tearing paper both change the shape of the object
- Shape is a property of the appearance of an object
- Hence, sharpening a pencil and tearing paper both change the appearance of the object

- Sharpening a pencil and tearing paper both change the appearance of the object
- Appearance is a kind of physical property
- So, sharpening a pencil and tearing paper both change the physical property of the object

- Sharpening a pencil and tearing paper both change the physical property of the object
- If something undergoes a physical change then the physical properties of that something will change
- Hence, pencil and paper underwent a physical change

Hence, pencil and paper underwent a physical change
Sharpening a pencil and tearing paper are examples of physical changes. Which statement describes why these are physical changes?
- Paper is a kind of object 
- A pencil is a kind of object 
- If something undergoes a physical change then the physical properties of that something will change 
- Tearing paper changes the shape of the paper 
- Shape is a property of the appearance of an object 
- Appearance is a kind of physical property 
- Sharpening a pencil changes the shape of the pencil