Final answer:
The SI unit of volume is the cubic meter (m³), and the liter (L) is a more convenient unit used for everyday purposes.
Step-by-step explanation:
The SI unit of volume is the cubic meter (m³), which is the volume of a cube with sides of 1 meter in length. In addition to the cubic meter, the liter (L) is another commonly used unit of volume that is more convenient for everyday use. One liter is equal to one thousandth of a cubic meter (1 L = 1/1,000 m³), and also equivalent to 1000 cubic centimeters (cc).