| Physical Quantities | Quantifiable and measurable quantities like length, mass, time, density, and temperature. |
| Base Quantities | Fundamental quantities such as mass, length, and time. All other physical quantities are derived from these. |
| Derived Quantities | Quantities obtained by multiplying or dividing base quantities. |
| Non-Physical Quantities | Cannot be measured in standard units. Examples include taste, feeling, and color. |
| Point to Ponder | Measurement involves comparing to a standard. Example: Length of 1.65 meters (1.65 is the numerical magnitude, meter is the unit). |