ProEdify Tees Prep - Units of Measure (Part 1)

Introduction to Measurement

• Measurement Definition: Assignment of a numerical value to an object's physical property.
  • Common physical properties: length, volume, density.
• Importance of Units: Necessary to assign units to numerical quantities to convey relative size or magnitude.
  • Example: Length of a shoe as '10' without units is meaningless.

Units of Measure

• System of Measure: Developed for accurate and reproducible measurement of physical quantities.
• SI System: International system used by scientists.
  • Comprehensive with many units but focus on a few for Ts.

Fundamental Physical Properties

• Essential properties for the Ts:
  • Mass
  • Length
  • Temperature
  • Time
• Base Units: Used to define more complex units (derived units).

Understanding Derived Units

• Derived Units: Complex units using base units.
  • Example: Area (meters squared) derived from meter.
  • Illustration: Line 2 meters long forming a square - area calculated as 2 meters x 2 meters = meters squared.

Important Derived Units for Ts

• Mass per Unit Volume and Meters per Second are derived units.
• Some measures have unique names (e.g., liter, newton) while others are formula-based.
• Some derived units need other derived units (e.g., density, pressure).

Conclusion

• The lesson covers the basics of the SI system of measurement.
• Further details on derived units and their applications will be discussed in subsequent lessons.

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