en.wikipedia.org/wiki/United_States_customary_units

United States customary units are a system of measurements commonly used in the United ... The International System of Units (SI), the modern form of the metric system, ..... The slug is another unit of mass derived from pound-force.

www.khanacademy.org/math/cc-fifth-grade-math/cc-5th-measurement-topic/cc-5th-unit-conversion/a/metric-units-of-mass-review

In the metric system of measurement, the most common units of mass are the gram ... Identify the most reasonable unit to measure the mass of a pack of gum.

www.montereyinstitute.org/courses/DevelopmentalMath/COURSE_TEXT_RESOURCE/U06_L2_T1_text_final.html

The metric system uses units such as meter, liter, and gram to measure length, liquid volume, and mass, just as the U.S. customary system uses feet, quarts, and ...

www.athropolis.com/popup/c-metric.htm

Metric measurements for length, mass, volume, temperature with conversion calculators. Learn all about meters, liters, grams and more!

www.varsitytutors.com/hotmath/hotmath_help/topics/weight-mass

Weight is measured in standard customary units. The mass of an object is the amount of material it contains. Mass is measured in standard metric units.

www.mathsisfun.com/measure/metric-mass.html

Metric Mass (Weight). set of weights. Mass: how much matter is in an object. We measure mass by weighing, but Weight and Mass are not really the same thing.

www.reference.com/science/unit-measurement-mass-da71f8b1e510748c

A common unit of measure for an object's mass is the metric unit grams. However , mass is often confused with weight, which are similar ideas but different ...

socratic.org/questions/what-is-the-metric-unit-for-measuring-mass

Sep 29, 2016 ... Kilogram (kg) http://physics.nist.gov/cuu/Units/kilogram.html There are other units for measuring mass, but this is the base unit for the SI (or ...

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

The Metric System is based on the fundamental units of measure for length, volume, and mass. Length: meter (m). Volume: liter (L).

www.virtualnerd.com/middle-math/measurement/metric-system/choose-best-metric-unit-mass