1. Units of Measurement

2. Base Units Length =_______________ Mass = _________________
Time = _________________
Temperature = ________________
Electric Current = ______________
Amount of Substance = __________

3. What Units do Scientists Use When Measuring Quantities?
The International System (SI). Otherwise known as the Metric System.
Why would scientists not use the English system (inches, feet, miles, pounds)?
- It is not internationally universal.

4. What about other Base Units?
Area?
Use a derived unit…
How do you find the area of a rectangle?
A=l x w
Length and width are each measured in meters.
So if you multiply one meter by another meter, you will get meters squared.

5. Example of a Derived Unit.
Area of a rectangle 5 meters (m) by 4 meters (m).
A= 5m x 4m
5 x 4 = 20
m x m = m squared.
A=20 square meters