For the Classroom  Units
Objectives:
Familiarize students with the various types of units and how to convert between different units.
Discussion Topics:
English vs. Metric
 Which unit systems are primarily used where
Distance
 mm – (approximately the width 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=ma (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


