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, the ampere for electric current, the kelvin for
temperature, the ...

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

Mar 30, 2011 **...** Image info U.S. National Prototype Kilogram. ©Robert Rathe The kilogram is the
**SI base unit of mass** and is equal to the **mass** of the international prototype of the
kilogram, a platinum-iridium **standard** that is kept at the International Bureau of
Weights and **Measures** (BIPM). The primary **standard** of **mass** for ...

physics.nist.gov/cuu/Units/units.html

**SI base units**. The SI is founded on seven **SI base units for** seven base quantities
assumed to be mutually independent, as given in Table 1. ... base units.
Examples of such SI derived units are given in Table 2, where it should be noted
that the symbol 1 for quantities of dimension 1 such as **mass** fraction is generally
omitted.

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

Presentation of units of **measurement** and the International System of Units (**SI):**
**base units** of **measurement** and derived units, definitions, prefixes, abbreviations.
... kilogram (kg), The kilogram is the **mass** of the platinum-iridium prototype which
was approved by the Conférence Générale des Poids et Mesures, held in Paris ...

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

Density is another **measurement** derived from **SI** basic **units**. The density of a
material is defined as its **mass** per **unit** volume. In this example, each volume of
water is different and therefore has a specific and unique **mass**. The **mass** of
water is expressed in grams (g) or kilograms (kg), and the volume is **measured** in
liters (L), ...

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

of **Measure**. In 1960 the International System of Units was proposed as a
replacement for the Metric System. The seven base **units for** the SI system are
given below. **SI Base Units** ...

www.gordonengland.co.uk/conversion/xsiunits.htm

Introduction to units of **measurement** and the International System of Units (**SI**
**units**). **SI Base units** include metre, kilogram, second, ampere, kelvin, mole and
candela for respective quantities of length, **mass**, time, electric current,
temperature, amount of substance and luminous intensity.

www.britannica.com/science/International-System-of-Units

Sep 15, 2017 **...** The General Conference on Weights and **Measures** (CGPM) added three new
units (among others) in 1948: a **unit of** force (the newton), defined as that force
which gives to a **mass** of one kilogram an acceleration of one metre per second
per second; a **unit of** energy (the joule), defined as the work done ...

www.si-units-explained.info/mass

Much of this concern is due to commerce – how much something weighs is often
a **measure** of how much it costs, whether it's rice or gold. As civilizations grew
they each adopted **standards** for **measuring weight**, or as we will shortly see,
**mass**. Today we use the kilogram (1000 grams) as the **standard measure** of **mass**
.