If I was you i would use millimetres or centimetres.
Grams
I would use a micrometer. A caliper would do as well.
What do you want to measure about the marble? Its diameter, radius, circumference, volume, mass, density...?
It would be the simplest way to do so.
Calipers would be accurate, a micrometer would probably be most accurate. there's a few options, depends on your purpose.
Grams
I would use a micrometer. A caliper would do as well.
milimetersMilliliter
That depends what aspect of a marble you want to measure, for example its diameter, its mass, its density, its color, etc.
millimetres or mm
Mass is measured in kilograms. Weight is measured in newtons. If you are asking which unit to choose to measure then mass of a marble, then you need to use the submultiple of the kilogram, the gram.
What do you want to measure about the marble? Its diameter, radius, circumference, volume, mass, density...?
It would be the simplest way to do so.
I would use a fabric tape measure.I would use a fabric tape measure.
Calipers would be accurate, a micrometer would probably be most accurate. there's a few options, depends on your purpose.
You would use area. I would use the meter2. Okay
i would think you would use a tape-measure.