1 microgram
1 µgMass · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Mass
In your hand
Bar length measures mass, not physical size. Both bars start at zero kilograms (kg). Pictures identify the objects only.
A little perspective
The wet mass of a copepod is about 10 times 1 microgram.
Mass: 1 µg; definition.
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Defined wet mass: 10 µg; defined specimen; range 3 µg–30 µg.
A defined 2 mm adult calanoid copepod specimen with a 10 microgram wet mass. The body span excludes the long antennules; species, life stage and hydration produce wide variation.
Defined examples — our methodology
The marked defined wet mass is calibrated. Unmeasured illustration details are representative.
Measurement details
Compare 1 microgram with the wet mass of a copepod. The notes below explain how each value was chosen.
Mass · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Defined wet mass · defined specimen · range 3 µg–30 µg
A defined 2 mm adult calanoid copepod specimen with a 10 microgram wet mass. The body span excludes the long antennules; species, life stage and hydration produce wide variation.
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
Mass is distinct from weight: an object’s mass stays the same as gravity changes.
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A little smaller. A little larger.