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Background Research

My experiment is important because it gives you more information about water density. It also gives you more information about how salt can affect things and about what eggs can be affected by.
My experiment is related to the real world because it is similar to ships floating on water. Ships only float because of water density and the things that are under it.
Key Words:
density- the state or quality of being dense
salt- a crystalline compound
eggs-a roundish part of the dairy family
mass-a body of coherent matter
volume-the amount of space, measured in cubic units
water- a transparent, odorless, tasteless liquid
serial dilution-serial dilution is the stepwise dilution of a substance in solution

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Hypothesis and Variables

If I put a half of cup of salt in the water vs the cup with just water the egg will float because salt water is stronger that regular water.

Independent Variable: amount of salt
Dependent Variable: the height of egg in the water
Constants: same type of cup, same type of water, same type of salt, and same type of eggs
Control Variable: the cup of just water

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Materials

Bag of clear 16 oz plastic cups
Table salt
Water
Eggs (9)
Measuring cup
Spoon for stirring
Lab notebook

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Procedure

1. Put room temperature water in 9 clear 16oz cups.

2.Label three cups just water cup 1, cup 2, and cup 3; then label the other 3 cups 1/4 cup salt cup 1, cup 2, and cup 3; then label the last three cups 1/2 cup salt cup 1, cup 2, and cup 3.

3. Add 1/4 cup of salt to all of the 1/4 cup salt. Then add 1/2 cup of salt to all of the 1/2 cup salt.

4. Stir the salt that is in 1/4 cup salt and that is in 1/2 cup salt.

5. Put three egg into the just water cups, put three eggs into all the 1/4 cup salt cups, and put three eggs into all the 1/2 cup salt cups.

6. Now just record your data

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Project Photos

This is the egg in the

just water cup.

This is the egg in the 1/4 cup of salt cup.

This is the egg in the 1/2 cup of salt cup.

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Data Table

Egg Floating in Salty Water

Independent Variable	Trial 1	Trial 2	Trial 3	Average	Range
Just Water	4 inches	3 inches	4 inches	3.7 inches	1 inch
1/4 cup of salt	3 inches	4 inches	3 inches	3.3 inches	1 inch
1/2 cup of salt	2 inches	3 inches	2 inches	2.3 inches	1 inch

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Graphs

How Salty Does Water Have To Be For An Egg To Float?

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Discussion

On my graph I have realized that if you put more salt in the water, the egg will float more.
The IV did affect the DV. The cup with just water, the egg sunk to the bottom. The cup of 1/4 salt, the egg floated half way. Lastly the cup of 1/2 salt, the egg floated all the way to the top.
The amount of salt could have affected my results. If I'd put more salt in each of the cups there will probably be a greater chance of the egg floating more in each cup.

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Conclusion

I could extend my experiment by measuring the time of the egg floating on the water. I can also extend my experiment by measuring the length of egg under the water instead of above the water. I learned that the salt affected the water a lot. The salt changed the color of the water. The salt also changed the weight of the water. The salt also changed the height of the water. After a while if you let the salt sit in the water for a long time the color of the water will change back to it's regular color.

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Acknowledgements

I would like to thank my mom for helping me with my science project and for helping me get all my materials.
I would also like to thank my science teacher, Ms. Huber for helping me with picking my science project and for steping me through the way.
Lastly I would like to thank my computer teacher, Ms. Whitty for allowing me to work on my science project in class and for helping me with all my problems.

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Bibliography

Books

Why do ships float? by Susan Markowitz Meredith
Water Science Projects by Madeline Goodstein

Websites

www.sciencebuddies.com
www.google.com