Compare metric units of mass Quiz Welcome to your Compare metric units of mass Quiz Please click "Next" Which one is heavier 250 grams or 3 kilograms 3 kilograms 250 grams they are equal Which one is greater 5 tonnes or 5000 kilograms 5 tonnes 5000 kilograms they are equal Which one is heavier 456 milligrams or 4.56 grams 456 milligrams 4.56 grams they are equal Which one is lighter 0.7 kilograms or 65 grams 0.7 kilograms 65 grams they are equal Which one is heavier 0.5 grams or 500 milligrams? o.5 grams 500 milligrams they are equal Time is Up! Time's up