Question

what is the base unit of mass when using the metric system?
a kilogram

b meter

c pound

d ton

Explanation:

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

• Option a: The kilogram is the base unit of mass in the metric (SI) system.
• Option b: The meter is the base unit of length, not mass.
• Option c: The pound is a unit of mass in the imperial system, not the metric system.
• Option d: The ton (metric ton) is a derived unit of mass (1 metric ton = 1000 kilograms), not the base unit.

Answer:

a. kilogram