Introduction
Density has baffled scientists for a long time. Today, it will be our mission to figure out density in liquids and why they separate.
Task
What is density? You are in the cafeteria, and you are craving a salad. When you arrive at the salad bar, you realize that a salad is not a salad without dressing. When you reach for your favourite dressing, you notice there is a layer of oil sitting on top. Why does this happen? Why don't the different liquids stay together? What is this madness!?
Your goal today is to figure out why this happens. How does density vary in liquids?
Process
A. Your first task is to explore what density is:
1. What is density?
2. What is the density of water?
3. How are the layers formed due to density?
To find the answers to some of these questions, visit: HERE!
And if you can't find it there, visit: HERE!
B. Now that you have answered those questions, we will conduct an experiment. Get in groups of 3.
You will need:
1/4 cup honey
1/4 cup karo syrup
1/4 cup dish soap
1/4 cup water
1/4 cup vegetable oil
1/4 cup rubbing alcohol
1/4 cup lamp oil
Directions: in a graduated cylinder, from the top of the ingredient list to the bottom, slowly and carefully add the liquids.
1. Observe what happens
2. Record your observations
3. Draw a picture of the final result
Evaluation
Your researched questions and varying answers should be turned in. Along with those answers, your experiment will be left to sit over night and graded based on separation and correct following of instructions.
Conclusion
Congratulations! You now can see and have learned about the density of liquids. Now when you go to eat your salads, you will have a better understanding of why it happened.
Credits
This idea was taken from pinterest. I saw a picture and I took it.
To see what I searched and where this idea originated from, click: THIS