Part 1 Measurement and Density Introduction Types of

Part 1 Measurement and Density Introduction

Types of Measurement Systems English System Inches, Feet, Miles Length Meters Cups and Gallons Volume Liters Pounds Mass (Weight) Grams Fahrenheit Temperature Celsius (Only United States) Metric (Rest of World and Science)

Metric System

Density – Why Should I Care?

Understanding Density …. • Can save you $. • Can save your life! • But more on that later ….

The Coke Challenge …. • Regular Coke? • Sinks! • Diet Coke? • Floats!

What Is Density? • How heavy something is compared to its size. • Density = Mass (Weight)/Volume

If you Cut an Object in Half …. • Will its density change? • No. • Why?

Which Is Denser? • Why?

Every Material Has Its Own Density • All numbers are in grams/cm 3 • Gas is • Ice is • Water is • Brick is • Gold is 0. 7 0. 9 1. 0 1. 8 19. 3!

Buoyancy • If an object is less dense than a liquid …. • It will float! • If an object is denser than a liquid …. • It will sink!

What Other Ways Is Density Useful? • Helps fish, balloons and submarines move up and down. • Lower density materials help cars become lighter and go faster. • Buoyancy can be used to lift things more easily.

How Can Density Save Me Money? • It can keep you from getting ripped off. • Has anyone tried to sell you jewelry saying it was pure gold? • How would you test the jewelry without damaging it?

How Can Density Save My Life? • What will you do if you fall into the water and can’t swim? • How would you keep your head above water until you are rescued?

Density Lab • Purpose: • To determine the density of several solid objects.