Diggin That Density

1
Diggin That Density

• A Look at Density and How to Calculate It.

2
Remember Back

• Volume Amount of Space something takes up. It
  is 3-Dimensional

• Mass- Amount of matter something is made of.

3
Remember Back

• Volume Measured in milliliters (mL) or in cubic
  centimeters (cm³)

• Mass- Measured in grams (g).

4
Remember Back

• So volume is the amount of space you have and.

• Mass is how much of something you have.

5
Bring it Together

• Density is a combination of volume and mass.
• Density is the amount of matter in a given
  volume.
• The amount of stuff in a certain space

6
Figuring it Out

• There is a mathematical formula for calculating
  density.
• Density Mass ? Volume
• D M ? V

7
Units for Density

• Just like length, volume and mass density has to
  be labeled with the correct unit.
• g/cm³ or g/mL is the standard unit for density.
• Remember that a cm³ is basically the same as a mL.

8
Lets Practice

• Liquid E had a mass of 82.61g. You massed 100mL
  of this liquid.
• Plug it into the formula.

9
Lets Practice

• D 82.61g ? 100mL
• D .8261g/mL

10
Will it Float?

• Density can predict if something will float. How?

11
Will it Float?

• The object with a higher density than water
  sinks. If it has lower density it floats.

12
It Floats

• That is why large ships float. They are less
  dense than water.

13
Density of Water

• Using our results from yesterday, what is the
  density of sea water?
• 100.84 g ? 100 mL
• 1.0084 g/mL.