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
Technically neither. A baseball is likely to be measud in ounces, since baseball is American, and the US has not formally adopted metric measurements. However, if the question is asking which would be the appropriate measurement - grams or kilograms - the answer would be grams. See the related question below.
grams
grams
grams
Grams
Grams
grams
kilograms! its obviously to big for grams