The table below shows metric units of mass, with the relationship of each unit to 1 gram represented as a power of 10. Metric Units of Mass Units Power of 10 Microgram 10 Superscript negative 6 Milligram 10 Superscript negative 3 Centigram 10 Superscript negative 2 Gram 10 Superscript 0 Kilogram 10 cubed Which statement comparing these measures is true? A microgram is 1,000 times greater than a milligram. A milligram is 10 times greater than a centigram. A centigram is 100 times greater than a microgram. A kilogram is 100,000 times greater than a centigram.