For Each Historical Identification Question, Define the Term and Briefly

question 80

Essay

For each historical identification question, define the term and briefly describe its historical significance.
Persians

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Definitions:

Mass

An assessment of the quantity of substance contained within an object, usually expressed in kilograms or grams.

Chemical

A substance produced by or used in a chemical process, including elements and compounds.

Density

A measure of how much mass is contained in a given unit volume of a substance.

Volume

The size of the space covered by an object or a substance.