1. Teaching Point: “To calculate the density of solids and liquids.”
Do Now Discussion: When you mix oil and water, what happens? Why do you think this happens?

2. The Compactness of a Material
TP: “To calculate the density of solids and liquids.”
The Compactness of a Material
Density- a measure of how much stuff there is in an object (mass = g) divided by how much space that object takes up (volume = cm3); the “compactness” of a material.
The units for density are grams per cubic centimeter (g/cm3)

3. How Density Affects Substances
TP: “To calculate the density of solids and liquids.”
How Density Affects Substances
A substance that is less dense than what is around it will move up.
A substance that is more dense than what is around it will move down.

4. Water + Vegetable Oil + Maple Syrup
TP: “To calculate the density of solids and liquids.”
Water + Vegetable Oil + Maple Syrup

5. The Compactness of a Material
TP: “To calculate the density of solids and liquids.”
The Compactness of a Material
Predict which box is more dense? Justify your answer using your observations.
Box A Box B

6. How Mass Affects Density
TP: “To calculate the density of solids and liquids.”
How Mass Affects Density
How would you compare the volume of Box A to Box B? Justify using evidence from the picture.
Box A Box B

7. How Mass Affects Density
TP: “To calculate the density of solids and liquids.”
How Mass Affects Density
How would you compare the mass of Box A to Box B? Justify using evidence in the picture.
Box A Box B

8. How Mass Affects Density
TP: “To calculate the density of solids and liquids.”
How Mass Affects Density
When volume stays the same but the mass increases, density increases.
Box A Box B

9. How Volume Affects Density
TP: “To calculate the density of solids and liquids.”
How Volume Affects Density
= 1 gram
Box A Box B
How would you compare the volume of Box A to Box B?

10. How Volume Affects Density
TP: “To calculate the density of solids and liquids.”
How Volume Affects Density
= 1 gram
Box A Box B
How would you compare the mass of Box A to Box B?

11. How Volume Affects Density
TP: “To calculate the density of solids and liquids.”
How Volume Affects Density
= 1 gram
Box A Box B
When mass is kept the same but volume increases, density goes down.

12. Density Formula Density = Mass / Volume
TP: “To calculate the density of solids and liquids.”
Density Formula
Density = Mass / Volume
If mass = 200 g, and volume = 120 cm3, calculate the density of the object.

13. Quick Assessments Density is how much space an object takes up.
TP: “To calculate the density of solids and liquids.”
Quick Assessments
Density is how much space an object takes up.
True or False
2. What is the density formula?
a. Mass times volume
b. Volume divided by mass
c. Mass divided volume
d. Density times volume

14. Intellectual Engagement
TP: “To calculate the density of solids and liquids.”
Intellectual Engagement
An object that has a density greater than 1 g/cm3 will sink in water. Why might the leader of a team of mechanical engineers need to be very accurate when measuring the exact mass and volume of a ship? Give an example.
-or-
How might the density of an object change if you took it to the moon? Explain your reasoning.

15. Class Activity- Types of Data
TP: “To calculate the density of solids and liquids.”
Class Activity- Types of Data
Task: Create the data table below in your notes, and then begin calculating the density of the objects:

16. TP: “To calculate the density of solids and liquids.”
Lesson Summary
In your tables of four, go back into your notes and consider what we have just learned today, and then…
1. Identify three (3) important concepts we learned today
2. Place those the three in order from the most important concept to least important.