Question

what is the basic unit of mass (weight) in the metric system? *

○ gram
○ milligram
○ kilogram
○ centimeter

Explanation:

To determine the basic unit of mass in the metric system, we analyze each option:

• "milligram" is a sub - multiple of the gram (1 milligram = $10^{- 3}$ gram), so it's not the basic unit.
• "kilogram" is a multiple of the gram (1 kilogram = 1000 grams), and while it's widely used in daily life for measuring larger masses, the gram is the base unit.
• "centimeter" is a unit of length, not mass, so it can be eliminated.
• The gram is defined as the basic unit of mass in the metric system.

Answer:

A. gram