- Matter in the solid phase has definite volume
- One sample is a solid sample of aluminum
- Hence, the solid aluminum has definite volume

- Matter in the liquid phase has definite volume
- One sample is a liquid sample of aluminum
- So, the liquid aluminum has definite volume

- The solid aluminum has definite volume
- The liquid aluminum has definite volume
- So, both samples have definite volume

Therefore, both samples have definite volume
One similarity between a small, solid sample of aluminum and a large, liquid sample of aluminum is that both samples have
- Matter in the solid phase has definite volume 
- One sample is a solid sample of aluminum 
- Matter in the liquid phase has definite volume 
- One sample is a liquid sample of aluminum