Previous
Topic
 Term    : 1        Exploring whole numbers ( Number Operations & Number Theory )
Module : 1 - Measuring When It Matters 
Unit 1      : Making Accurate Measurements   -   The History Of Measurements  
                                                                        Weight  		 
   
 

These ancient units of measurement can be considered as non-standard units of measure since individual grains or seeds can vary slightly in size and weight from plant to plant.

The grain was the earliest unit of mass and is the smallest unit in the troy systems. The early unit was a grain of wheat or barleycorn used to weigh the precious metals silver and gold.

The carat is a unit for measuring gemstones that had its origin in the carob seed, which later was standardized at 1/144 ounce and then 0.2 grams.		  

 Back To Quiz		  TOPICS
tgate.gif (13248 bytes)