Unit 1: The Metric System & Unit Conversions

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# Unit 1: The Metric System & Unit Conversions - PowerPoint PPT Presentation

Unit 1: The Metric System & Unit Conversions. Section A: Systems of Measurement. Corresponding Book Sections: Chapter 1 PA Assessment Anchors: S11.A.1.1. English (FPS) Foot, Pound, Second Units like: Feet Miles Gallons Pounds. Metric System (SI) “International System”

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### Unit 1: The Metric System & Unit Conversions

Section A: Systems of Measurement
• Corresponding Book Sections:
• Chapter 1
• PA Assessment Anchors:
• S11.A.1.1
English (FPS)

Foot, Pound, Second

Units like:

Feet

Miles

Gallons

Pounds

Metric System (SI)

“International System”

Units Like:

Centimeter

Dekaliter

Newton

Milligram

Two systems of measure:
How to use the prefixes
• The prefix goes before the base word
• Example:

cm = centimeter

Prefix

Base

Practice with Prefixes
• One hundredth of a meter
• Ten grams
• One hundred liters
Section B: Unit Conversions
• Corresponding Book Sections:
• Chapter 1
• PA Assessment Anchors:
• S11.A.1.1
How to convert between units

Ex: Convert 1 m to cm

1. Write the unit you’re starting with over 1

2. Find the appropriate conversion

1 m = 100 cm

3. Line up the units so they cross out

How to convert between units (Continued)

4. Keep doing this until you’re left with the units you want in your answer

5. Multiply the numerator and denominator

100 cm

More Conversion Practice
• Convert:
• 15 m to cm
• 20 cm to km
• 300 mm to m
Converting between systems:
• Can we convert between FPS and SI?
• Absolutely!!
• Most of the conversion factors are on the inside cover of your textbook
Practice converting between units:
• Convert
• 1 m to mi
• 2 gallons to mL
• 4.3 lb to Newtons
A good website to check your work:
• http://www.onlineconversion.com/auto_convert.pl
• You MUST show your work on problems and the homework, but this is a good place to check your answers!