## Welcome to Oreo Science!

### EXPERIMENT:

- To determine the density of an Oreo cookie. This experiment is to be performed two different ways, denoted as "Method 1" and "Method 2."

### MATERIALS (method 1):

- Several Oreo cookies
- Scale
- Overflow Beaker (See Picture 1)
- Water
- Graduated Cylinder
- A Brain

### PROCEDURE (method 1):

- Turn on brain and make sure it works properly
- Measure mass of a stack of 5 Oreo cookies on scale
- Fill overflow beaker with water until full, discard overflow water
- Plunge a stack of 5 Oreo cookies into water, allowing water to overflow into graduated cylinder
- Measure volume of overflow water, remember to measure from bottom of meniscus.
- Convert measured volume to cubic meters
- Apply density formula (
**Density=Mass/Volume**) to determine Oreo density

### DATA (method 1):

- Data table 1 shows the volume and mass obtained using the procedure outlined in method 1.

Oreo Mass (kg) 0.05589 Overflow Volume (m ^{3})0.000058

### RESULTS (method 1):

- If the mass of the Oreo cookies is measured correctly, the amount of water displaced is measured correctly, and the density formula is applied correctly, the density calculated should be aroundÂ
**964 kg/m3** - After the Oreo cookie remained in water for an extended period of time, the Oreo, having absorbed a lot of water, liquefied and began smelling quite rancid. A white mold could be seen growing on the creme.

### MATERIALS (method 2):

- Multiple Oreo cookies
- Low-Gauge fishing line
- Ruler
- Scale

### PROCEDURE (method 2):

- Disassemble Oreo cookie into its three components (cookie, cream, cookie)
- Use fishing line to separate cream from cookie

- Calculate mass of each individual cookie component
- Measure radius and thickness of each component to calculate volume
- Apply Density formula (
**Density=Mass/Volume**) to each component - Calculate average density as such:
- Cookie Density + Cream Density + Cookie Density divided by 3

### DATA (method 2):

- Data table 2 shows the volume, mass, and density measured using the procedure outlined in method 2.

Physical Quantity Cookie Creme Mass (kg) 0.00416 0.00336 Volume (m ^{3})4.986x10 ^{-6}2.15x10 ^{-6}Density (km/m ^{3})834.385 1562.485

### RESULTS (method 2):

- If all calculations are performed correctly, the average density should be aroundÂ
**1077 kg/m**^{3} - The cookie remained disassembled until it was reassembled and eaten

### POSSIBLE APPLICATIONS:

- Finding out how much milk you can put in a cup and dunk the Oreo cookie without overflowing the cup
- A fun way of teaching students the water displacement method of determining density of objects.