The document discusses different systems of measurement throughout history. It describes ancient systems like cubits based on body parts that lacked standardization. Standards later developed with Egypt standardizing cubits. The English/FPS system uses feet, pounds, and seconds and is mostly used in America for everyday tasks. The metric system is now the global standard using grams, meters, and liters along with prefixes for scaling units. While the US uses FPS daily, the metric system is the scientific and technical standard internationally.

1. 9 th Grade Chapter 1 Lesson 3 Pgs. 8-10 For Student Use Only

2. Systems of Measurement System of Measurement- a collection of compatiable, related units that can be used to measure quanitites as length, mass or weight, or volume. These systems have changed and developed over time.

3. Systems of Measurement Ancient Measurements: Cubit- (one of the earliest measurements)- the length of a persons arm from elbow to tip of middle finger. Palm -length of palm Span-the width of your outspread hand from tip of thumb to tip of pinky Digit- a fingers width Foot- the length of a persons feet Was this system accurate? No, people come in all sizes

4. Systems of Measurement Standards were developed to help adjust for the different sizes in people. Standard of Measurement- a specific measure to which other measures are compared to ensure uniformity. When standards are agreed upon, measurements are reasonably accurate. Egyptians standardized their cubit and other measurements

5. Systems of Measurement FPS System (aka English System) Foot-Pounds-Seconds- (FPS) system is used in America today. This system was developed in Rome. The people of the Middle Ages added other measurements. Ex. Perch=5.5 yards, acre=160 perches, yard=3 feet and 2 types of pounds. This system is used mostly in America for everyday measuring

6. Systems of Measurement The Metric System Used all over the globe Has three basic measurements Gram- unit of mass Meter- unit of length Liter- unit of capacity and liquid measures

7. Systems of Measurement Metric System Also includes: Second- unit of time Degree Celsius- used to measure temperature Newton- unit of force Joule- unit of work and energy

8. Systems of Measurement Metric System Prefixes Attached to name the unit and make the unit bigger or smaller (this is a base 10 measurement) Milli- 1/1000 or 10 -3 Centi- 1/100 or 10 -2 Kilo- 1x1,000 or 10 3 Mega- 1x1,000,000 Micro- 1/1,000,000 Nano-1/1,000,000,000

9. Systems of Measurement Although the US uses FPS system for daily measurements, our standard of measurement is the Metric System. The metric system is universally accepted as the standard of measurement for scientific and technical purposes.