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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

Foot, Pound, Second

Units like:

Feet

Miles

Gallons

Pounds

Metric System (SI)

“International System”

Units Like:

Centimeter

Dekaliter

Newton

Milligram

Two systems of measure:

• The prefix goes before the base word

• Example:

cm = centimeter

Prefix

Base

• One hundredth of a meter

• Ten grams

• One hundred liters

• cm

• hL

• Mm

Section B: Unit Conversions

• Corresponding Book Sections:

• Chapter 1

• PA Assessment Anchors:

• S11.A.1.1

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

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

5. Multiply the numerator and denominator

100 cm

dm

hm

km

Converting between units

• Convert:

• 15 m to cm

• 20 cm to km

• 300 mm to m

• Can we convert between FPS and SI?

• Absolutely!!

• Most of the conversion factors are on the inside cover of your textbook

• 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!