kilograms
Kilogram
Grams and kilograms are measurement of weight. For a letter you would use grams. For a package you would use kilograms as it weight is more.
kilograms
kilograms because grams are smaller than kilograms.
kilograms
you can't use kilograms to measure a orange, but you can use grams.
Kilogram
You could (theoretically) use either... However - Kilos is the preferred measurement.
Grams and kilograms are measurement of weight. For a letter you would use grams. For a package you would use kilograms as it weight is more.
kilograms
kilograms because grams are smaller than kilograms.
grams
grams
To measure a dinosaur, it is more appropriate to use kilograms because dinosaurs are large creatures and their weight is typically measured in kilograms. Grams may not be a suitable unit for such large measurements.
You can use either. If you use kilograms, you will probably get a decimal, less than 1, so grams would be commonly used. By the way, grams and kilograms are units of mass, not of weight.
I would use grams because grams would give you more significant figures for the measurement than kilograms