Which melon has a greater mass , one that is 4 kilograms or one that is 4,100 grams ?

1 kilograms = 1000 grams So, The melon which is 4100 grams has a greater mass since 4100 grams = 4.1 Kilograms and 4.1 kilograms is greater than 4 kilograms.

One that is 4,100 grams. A kilogram is 1,000 grams so 4 kilograms is 4,000 grams and 4,100 is bigger than 4,000 therefore 4,100 grams have more mass than 4 kilograms.