Chapter 2: Measurement and Problem Solving
Date:____________
Section 4: Unit Conversions - Notes
Objectives:
 Convert between units.
 Convert units raised to a power.
Unit Conversions:
 Question: How many seconds are in 532 days?

Units are _____________________, ___________________, and _________________________
like any other algebraic quantities.

Using units as a guide to solving problems is called _____________________________________
o
Always write every number with its __________________________________________.
o
Do not let units ______________________________________________ in calculations.
Units must flow logically from beginning to end.
o
Conversion factors are ________________ constructed from any two quantities known
to be equivalent.

o

Conversion factors can be _________________ because they are equal to 1 and
the inverse of 1 is 1.
In solving problems, always check if the ___________________________ are correct,
and consider whether or not the magnitude of the answer makes sense.
When converting quantities with units raised to a power, the conversion factor must also be
____________________________________________.
Practice:
1. Convert 7.8 km to miles.
2. Convert 0.825 m to millimeters.
3. One lap of a running track measures 255 m. To run 10.0 km, how many laps should you run?
4. A circle has an area of 2659 cm2. What is its area in square meters?
5. An automobile engine has a displacement (a measure of the size of the engine) of 289.7 in.3
What is its displacement in cubic centimeters?