The document defines various measurement terms including volume, caliber, length, weight, temperature, the metric system, and time. It explains that length was one of the earliest measurements used by humans based on body approximations. Weight was originally measured in grains of wheat. Temperature measurements originally used mercury-based thermometers until Fahrenheit improved the design. The metric system is a decimal system used internationally based on the meter and kilogram. Time sequences and compares the duration of events and rates of change.

1. Measurement Dictionary
Volume A caliber of voice or sound
Caliber: degree or grade of excellence or worth.
Length
Length is the most necessary measurement in everyday life, and units of
length in many countries still reflect humanity's first elementary methods.
Weight
For measurements of weight, the human body provides no such easy
approximations as for length. But nature steps in. Grains of wheat are
reasonably standard in size. Weight can be expressed with some
degree of accuracy in terms of a number of grains - a measure still
used by jewelers.
Gabriel Daniel Fahrenheit, a German glass-blower and instrument-
thermome
maker working in Holland, is interested in improving the design of
1714-1742
Mercury
thermometer which has been in use for half a century. Known as the
Florentine thermometer, because developed in the 1650s in Florence's
Accademia del Cimento this pioneering instrument depends on the
ter
AD
expansion and contraction of alcohol within a glass tube.
Metric system
The ʻ" Metric System” is a decimal system of measurement based on its units for length, the metre
and for mass, the Kilogram It exists in several variations, with different choices of base units though
these do not affect its day-to-day use. Since the 1960s, the International system of units(SI) is the
internationally recognized metric system. Metric units of mass, length, and electricity are widely used
around the world for both everyday and scientific purposes.
Time
Time is a part of the measuring system used to sequence events, to compare the durations of
events and the intervals between them, and to qualify rates of change such as the motions of objects.
Time is a part of the measurement system used to sequence events, to compare the durations of
events and the intervals between them, and to qualify rates of change such as the motions of
objects.