1. American / English units Scientific / International / SI Units
Imperial System
Metric System
Length
inches, feet, miles
cm, meters, kilometers
Volume
fluid ounces, pints, quarts, gallons
mL, liters, kL
Mass
ounces, pounds
grams, kilograms
Temperature
Fahrenheit
Celsius
Velocity
mph
kph

2. Metric System Chart

3. Metric System Chart
Metric System Chart

4. Meniscus = the curve of water in a graduated cylinder,
always read from the bottom

6. Practice reading these measurements:1. 2. 3.
________ °C

7. High Accuracy High Precision
How close a measured value is to a true value
Precision
How close measured values are to each other
The more decimal points, the more precise a tool is
2.34 grams vs. 2.3 grams
Low Accuracy High Precision
High Accuracy Low Precision
High Accuracy High Precision

8. Accuracy Examples: Precision Examples:
Boiling point of water is 100⁰C but the thermometer
reads 99⁰C
The recipe calls for ¾ cup of sugar but your sister accidentally measures out ⅞ cup of sugar
Precision Examples:
Mr. McCutcheon says he has about 100 students but Mr. Harabin knows that he only has 89
Jimmy measured the ounces of gold he had at about 10 but Pauly knew that he had exactly 12.35

9. EXAMPLES:

10. Remember to count the movement of the decimal point and that becomes the exponent…. Left = + …. Right = -
Example 1
12, x 10⁴
Example 2
10,456, x 10⁷
Example 3
x 10-⁴

13. Density

14. Density