1. Do Now: Quick Write Write everything that you know about density. Do not stop writing. If you come to a blank, write “…and…and…and…” until more comes to you.

2. Density What is Density? Mass per unit volume. (How much stuff is in a certain space) List some careers that may use density: Auto mechanics, fishermen, chemical engineers How can you tell if an object will float or sink? Compare its density to the density of liquid it will be placed in.

3. Density Remember, density is the mass per unit volume. (How much stuff is in a certain space) When placing an object in water, which has a density of 1g/cm 3, the object will float if its density is below 1, and will sink if it is above 1.

4. Density – Discuss with your groups How do you calculate the density of a regular shaped object? How do you calculate the density of an irregular shaped object?

5. Density How do you calculate the density of a regular shaped object? Mass: weigh object Volume: use water displacement or l x w x h How do you calculate the density of an irregular shaped object? Mass: weigh object Volume: use water displacement, only

6. Density Practice Problems STEP 1: Identify variables STEP 2: Write equation STEP 3: Fill in knowns STEP 4: Solve You have 10 minutes to work with group to answer these.

8. Soda Density Demonstration List the mass of sugar content for 6 sodas Predict if they will float/sink Watch Demo Record results Conclusion (MODIFIED): Describe one observation and why some sodas sink or float.