1. Aim: What is Density?
Do Now:
In your notebooks, describe how to find the density of an object (formula).
Also, what do you think determines an objects density?

2. I. Density: The amount of matter in a specific volume
- A physical property of matter.
- Measured in g/cm3 or g/ml.
- Helps identify matter. Every object has a different density.
D = M
** Density of an object remains the same no matter how many pieces it’s broken into ** V

3. Mass Volume = Density Mass Density Density = Volume Mass = Density x
Using the one density formula you can rearrange the variables to solve for mass and volume.
Mass
Volume =
Density
Mass
Density
Density =
Volume
Mass =
Density x
Volume

4. M D V

5. What does neutrally buoyant look like?
II. Buoyancy vs. Density
Buoyancy is an objects ability to float in water.
- determines if an object will sink, float or remain neutral in water.
What does neutrally buoyant look like?

6. Which color liquid is most dense?
Which color liquid is least dense?
Where would a metal sphere with a density of 3.0g/ml land?
1.3 g/ml -
2.9 g/ml -
4.3 g/ml -
5.4 g/ml -

7. An ice cube floats in H2O because it has a density:
Example: Compare the density of H2O
(water) to the density of an ice cube.
THINK
An ice cube floats in H2O because it has a density:
a) Equal to the density of water
b) Greater than the density of water
c) Less than the density of water
d) None of the above

8. Why does a steel ship float in water?
Densities in grams / cm3
D (water) = 1.0 g / cm3
D (wood) = 0.8 g / cm3
D (steel) = 7.8 g / cm3
D (lead) 11.3 g / cm3
D (air) g / cm3
Answer:
A ship has a steel shell that is hollow inside. The volume is mostly air. The ship and air together have a density less than water.

9. Closure:
From the back table, top bin; take a density review worksheet from the top bin to work on in class with your partner.