en.wikipedia.org/wiki/SI_base_unit

The International System of Units (SI) defines seven units of **measure** as a basic
set from which all other **SI units** can be derived. The **SI base units** and their
physical quantities are the metre for **measurement** of length, the kilogram for
**mass**, the second for time, ...

en.wikipedia.org/wiki/Mass

In physics, **mass** is a property of a physical body. It is the **measure** of an object's
resistance to ... The **standard** International System of Units (**SI**) **unit of mass** is the
kilogram (kg). The kilogram is 1000 grams (g), first defined in 1795 as one cubic ...

www.nist.gov/pml/weights-and-measures/si-units-mass

Mar 30, 2011 **...** The kilogram is the **SI base unit of mass** and is equal to the **mass** of the ... middle
school students learn about the 7 **SI base measurement** units.

chemed.chem.purdue.edu/genchem/topicreview/bp/ch1/index.php

... for the Metric System. The seven base **units for** the SI system are given below.
**SI Base Units** ... **mass**, kilogram, kg. time, second, s.

www.french-metrology.com/en/si/units-measurement.asp

... of Units (**SI): base units** of **measurement** and derived units, definitions, prefixes,
... kilogram (kg), The kilogram is the **mass** of the platinum-iridium prototype ...

chem.libretexts.org/Textbook_Maps/General_Chemistry_Textbook_Maps/Map%3A_General_Chemistry_(Petrucci_et_al.)/01%3A_Matter-_Its_Properties_And_Measurement/1.4%3A_Measurement_of_Matter%3A_SI_(Metric)_Units

Because it is a force, the **SI unit of weight** is properly the newton, but it is **common**
practice (except in physics ...

chem.libretexts.org/Core/Analytical_Chemistry/Quantifying_Nature/Units_of_Measure/SI_Units

Jul 18, 2017 **...** A set **unit of** prefixes have been established and are known as the SI prefixes or
the metric ... the sharing data with one another because of a **common** set of
**measurements**. ... **Mass** Density, Kilogram Per Cubic Meter, kg/m^{3}.

courses.lumenlearning.com/boundless-chemistry/chapter/units-of-measurement

The **SI units** of **measurement** have an interesting history. Over time they have ....
SI basic units. The density of a material is defined as its **mass** per unit volume.

www.npl.co.uk/reference/measurement-units/si-base-units/the-kilogram

Oct 8, 2010 **...** The kilogram is the International System of Units (**SI**) **unit** for **mass**. It is the only
remaining base unit to be defined by a physical object.