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You would use the unit of measure called "kilograms" to measure the mass of an elephant.
Strawberries would be measured in grams or ounces.
You Use Atomic Mass Number
Kilograms
Grams
Milligram: to measure its mass.
Mass is measured using kilograms.
You would use the metric unit "kilograms" to measure the mass of a wardrobe.
The SI unit for mass is the kilogram (kg)
GRAMS
Mass is measured in grams.
kl