Physics-1 Science word is originated from which word. - Scientia (Latin). Meaning of Scientia - To Know. Physical Quantities which can be define using only Magnitude.- Scalers Examples of Scalers- Density, Temperature, Volume, Electric Current, Time, Speed, Work Physical Quantities which can be define using Magnitude and Direction both- Vectors. Examples of Vectors- Velocity, Force, Linear Momentum etc. Measurement standards for a Quantity is - Unit How many types of measurement unit - Two (Fundamental & Derived Units) Fundamental Units - or independent units. like Meter, Second and Kg. Derived Units- Derived from Fundamental units. Defined in two or more units.