For the Classroom - Units

Discussion Topics:

English vs. Metric


• Which unit systems are primarily used where



Distance


• mm – (approximately the thickness of a dime)
• Terminology – Machinists express small measurements in thousands of an inch



Temperature


• TF = 2*TC + 32 (Approximately)
• Introduction to Kelvin



Mass

• Mass and weight are related properties of matter, but not the same



Volume

• The amount of space that an object or substance occupies



Pressure

• F=P*area (Examples: Piston/Air cylinder)


Energy


• The ability a physical system has to do work on other physical systems



Power


• Power is the rate at which work is performed or energy is converted



Density


• ρ=m/v (from General Equations section)
• Discuss Different materials
• Strength vs. Weight
• Additional Materials are listed on the inside card


Fractions/millimeters decimals



Unit Prefixes


• Introduce students to Scientific Notation (Exponential Notation)
• Show students how to use scientific notation functions on their calculators



Classroom Practice (with other supporting materials):


• How to use Calipers and a Micrometer
  
• Use a calculator to perform some basic unit conversations