Which of the following is the SI unit for measuring volume in the metric system?

• A. cubic meter (m^3)
• B. liter (L)
• C. gallon (gal)
• D. milliliter (mL)

Answer: (A)

Verified step by step guidance

1. Understand that volume is a measure of the amount of space an object or substance occupies.
2. Recall that the SI (International System of Units) unit for volume is derived from the SI base unit for length, which is the meter (m).
3. Since volume is a three-dimensional measurement, the SI unit for volume is expressed as cubic meters, written as \(m^{3}\), representing length × width × height.
4. Recognize that other units like liter (L), milliliter (mL), and gallon (gal) are commonly used for volume but are not SI units; for example, 1 liter equals 0.001 cubic meters.
5. Conclude that among the options given, the SI unit for volume is the cubic meter (\(m^{3}\)).