Metric ruler
A kilogram.
In the SI - the current metric system - that would be the kilogram. In older metric systems, the gram has been used as the unit of mass.
The unit of mass in SI is kilogram (kg).
You would measure that in grams, or milligrams.
Metric ruler
Grams.
Kilogram
The kilogram.
Pounds.
I would use grams.
An appropriate metric unit of mass for a pencil would be grams.
You would use kilograms (kg) to measure someone's mass in metric units.
kilograms
A kilogram.
In the SI - the current metric system - that would be the kilogram. In older metric systems, the gram has been used as the unit of mass.
GRAMS