1, meaning different, volume refers to the size of the space occupied by objects, and volume refers to the volume of objects that can be accommodated in wooden cases, oil drums, etc. An object has a volume, but it doesn't necessarily have a volume.

2. The measurement methods are different. Calculating the volume of an object means measuring its length, width and height from the outside, while calculating the volume of an object means measuring its length, width and height from the inside and then calculating. Therefore, for the same object, generally speaking, its volume is smaller than its volume.

3. The company names are not exactly the same. Usually, unit of volume uses: cubic meter, cubic decimeter and cubic centimeter. The unit of volume of solids and gases is the same as that of unit of volume, while the unit of volume of liquids is generally liters and milliliters. Volume conservation means that no matter how the shapes of two objects with the same volume change, the volumes of the objects remain unchanged. The concept of volume conservation is that the volume of the container is unchanged, which is equivalent to the conservation of mechanical energy.