Weighing objects using non standard units
Place your geometry box in one pan of the simple balance and weigh it using the following in the other pan (i) Tamarind seeds, (ii) Stones/ Pebbles and (iii) Eraser. Tabulate the weight found.
Geometry box: Lighter Tamarind seeds
Geometry box: Heavier Stones/Pebbles
Geometry box: Lighter Erasers
Place a tiffin box instead of geometry box. You can try this activity with other objects also.
Tiffin box: Lighter Tamarind seeds
Tiffin box: Heavier Stones/Pebbles
Tiffin box: Lighter Erasers
Weight of the object measured using tamarind seeds, stones/pebbles and erasers differ as they are not standard. Hence, we use standard weighing object called weighing stones.