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

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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”

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Unit 1: The Metric System & Unit Conversions

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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

### 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

• cm

• hL

• Mm

### 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

Convert 1 m to:

dm

hm

km

### 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!