We learned that Observations and Variables are part of Physical Quantity,
So, what is physical quantity? Well, physical quantity can be measured and is made up of a base quantity and derived quantity.
Base Quantities are the building blocks of other physical quantities, such as metre, kilogram and etc.
So, the BASE QUANTITY, is also the SI unit (Symbol for Unit)
Derived Quantities are derived from base quantities through defining and equation.
As such, we need to have prefixes to represent the gigantic numbers and the very small numbers.
For example, we have prefixes such as "Tera" and "Giga" to describe large. and also "micro" and "milli" to describe very small numbers.
So, why do have Prefixes? Feel free to click on the links below!
Lastly, we also learned about unit conversion.
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