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Author:
Sarah Kummeth

-Understand what density is.

-Understand the density theory.

-Know how to use the density equation to solve problems.

Cover photo: http://www.freepsddesigns.com/ice-cubes-in-water-psd-template/ ,Free PSD Designs & Vectors, 20 July 2010.

In this packet you will learn what density is and how to find it through a basic formula which you will use to solve for the three components of the formula when two are given. You will also learn about the density theory.

Tutorial

__ DENSITY__ is a measure of the ratio of a substance's mass to its volume.

Density is putting a value on how close all particles are squished together in a substance.

The formula to find a substance's density is **d=m/v**

__OR__

DENSITY= MASS divided by VOLUME

d= density m=mass v=volume

**The theory about density is that when a substance has a greater density than one near it (on top/bottom/within), the greater density will sink, while the lesser density will rise above it. **

**Think of helium-filled balloons, the balloon will float because the helium inside of it has a lower density than the air we breathe! This is why when you let go of the balloon's string, the balloon seems to travel upwards forever- the balloon is trying to get above the air's density because it has a lesser density!**

**Look at these layered liquids. Why don't they mix together?**

** **

**If you said they don't mix together because of their densities, you are correct!**

**The clear substance that sits on the top of the other liquids has the least density, while the yellow-ish substance at the bottom of the bottle has the greatest density. **

Source: Flickr, http://www.flickr.com/photos/27238916@N04/3920970822, July 30 2010

**ALWAYS REMEMBER d=m/v!**