Salt+Egg+Float

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Title
How salty does the sea have to be for a egg to float?

Broad Question
Why does an egg need salt to float?

Specific Question
How does salt make an egg float? How much salt does it take to float an egg?

Hypothesis
I hypothesize that it will take more salt to float an hard boiled egg than an uncooked egg.

Independent Variable:
Amount of salt

Dependent Variable:
Sink or float

Variables That Need To Be Controlled:
Cups,water, and eggs

General Plan
For my project I am going to see how much salt it will take for an egg to float. I will be doing my project at school in a classroom. I am going to take a dozen eggs and hard boil 1/2 of them. I will take 5 cups the same size, same amount of water, and same temperature. I will put different teaspoon amounts of salt in each cup.

Potential Problems And Solutions
Some problems I may encounter could be my eggs could crack. I could also measure my salt wrong. To make sure my eggs don't crack I will place them in cold water to start then bring them to a boil then reduce the heat then continue to let them cook for 10 minutes.I will be extra careful with my measuring.

Safety Or Environmental Concerns
One safety concern I may have is someone could get burned while cooking the eggs. During my experiment I will make sure I ware safety glasses and use potholders.

Experimental Design
For my experimental design I will be doing two trials. I will use two dozen of eggs. Twelve will be hard boiled and twelve will be raw. I am going to use several teaspoons of table salt in five different plastic cups of the same size and same amount of water.

Resources and Budget Table

 * Item || Number needed || Where I will get this || Cost ||
 * egg || 5 || my house || $0 ||
 * spoon || 2 || school || $0 ||
 * 16 oz cups || A bag full || school || $0 ||
 * notepad || 1 || home || $0 ||
 * T-salt || A container full || home || $0 ||
 * water || A bottle full || school || $0 ||
 * measuring cup liquid || 1 || school || $0 ||
 * ||  ||   || $0 ||
 * ||  ||   || $0 ||

Detailed Procedure
Set 5 cups all the same size up in a line with the same amount of water in them. Then put different amounts of salt and stir them.For the first cup I will place 1/2 a teasp., the 2nd cup will have 1 1/2 teasp., the 3rd cup will have 2 teasp. ,the 4th cup will have 3 1/2 and the 5th cup will have 5 1/2. After that I will put a hard boiled egg into each cup of water with the different amounts of salt in them and see which one floats better.I also will do the same procedure with eggs that are not boiled. Then wright it down in a notebook.

Photo List

 * 1) cups
 * 2) water
 * 3) salt
 * 4) egg
 * 5) notebook

Time Line
2/4-3/1

Data Table

 * Egg type || Amount of salt || Floated ||
 * Uncooked || 1/2 teaspoon ||  ||
 * Uncooked || 1 1/2 teaspoons ||  ||
 * Uncooked || 3 teaspoons ||  ||
 * Uncooked || 4 1/2 teaspoons || Floated ||
 * Uncooked || 5 1/2 teaspoons || Floated ||
 * Uncooked || 10 teaspoons || Floated ||
 * Cooked || 1/2 teaspoon ||  ||
 * Cooked || 1 1/2 teaspoons ||  ||
 * Cooked || 3 teaspoons ||  ||
 * Cooked || 4 1/2 teaspoons || Floated ||
 * Cooked || 5 1/2 teaspoons || Floated ||
 * Cooked || 10 teaspoons || Floated ||

Data Analysis

 * All Raw Data**
 * Egg type || Amount of salt || Floated ||
 * Uncooked || 1/2 teaspoon ||  ||
 * Uncooked || 1 1/2 teaspoons ||  ||
 * Uncooked || 3 teaspoons ||  ||
 * Uncooked || 4 1/2 teaspoons || Floated ||
 * Uncooked || 5 1/2 teaspoons || Floated ||
 * Uncooked || 10 teaspoons || Floated ||
 * Cooked || 1/2 teaspoon ||  ||
 * Cooked || 1 1/2 teaspoons ||  ||
 * Cooked || 3 teaspoons ||  ||
 * Cooked || 4 1/2 teaspoons || Floated ||
 * Cooked || 5 1/2 teaspoons || Floated ||
 * Cooked || 10 teaspoons || Floated ||

Results
The result of my project was at 4 1/2 teaspoons of salt my eggs would float no matter if they were raw or boiled.

Conclusion
Salty water does make objects float

Discussion
My independent variable which was the amount of salt was determined on my dependent variable whether or not my egg would sink or float a lot.My experiment showed me the more salt the more things float.I think my data was done correctly but I could have done more trials to get A better accuracy.I think my experiment would be useful to scientist who are researching the ocean and it's environment. Doing my experiment lets us know that things in the oceans salty water does float.

Benefit to Community and/or Science
I think my experiment would be useful to scientist who are researching the ocean and it's environment. Doing my experiment lets us know that things in the oceans salty water does float.