What basic units of measurement are used to describe mass, length, and volume in the metric system?

• A. Grams for mass, meters for length, and liters (or milliliters) for volume
• B. Kilograms for mass, centimeters for length, and milliliters for volume
• C. Ounces for mass, inches for length, and cups for volume
• D. Pounds for mass, feet for length, and gallons for volume

Answer: (A)

In the metric system, the basic units used to describe mass, length, and volume are grams for mass, meters for length, and liters for volume (with milliliters as a convenient smaller unit). Grams are the standard base unit for mass, while kilograms are larger multiples of grams used for heavier objects. Meters serve as the standard base unit for length, with centimeters as a smaller subdivision. For volume, liters are the standard unit, and milliliters are used for smaller quantities. The other options mix non-metric units (like ounces, pounds, inches, cups, gallons) or use metric units that aren’t the base set, so they don’t fit the standard way the metric system measures these dimensions. This makes grams, meters, and liters (or milliliters) the correct pairing.