If you where measuring a ant what metric unit would you use?

Answer 1

You should use kilograms.

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That is so wrong! A kilogram is a measure of mass, not of weight. Also, you would need over 300,000 ants to have a mass of 1 kilogram! The basic unit for weight is Newtons,

You could use a Newton, with scientific notation, to allow for the fact that an ant weights so little. Or a micronewton.

An ordinary household ant will weigh approx 30 micronewtons.

Answer 2

probably millimeters. you could get very large numbers if you use nanometers.

Answer 3

You would typically use millimeters or micrometers to measure an ant, as they are small creatures and these units are more appropriate for measuring their size accurately.