Single books in grams, sets of books in kilograms.
A gram is measured in grams. A kilogram is measured in kilograms.
Grams
grams
kilograms! its obviously to big for grams
Mass
A gram is measured in grams. A kilogram is measured in kilograms.
Matter can be measured in either grams or kilograms or a combination of both.
kilograms
kilograms
Grams
grams
grams
grams
grams
Grams
grams
kilograms! its obviously to big for grams