Books On Eggshells
By: Elsie J.
China, Age 9
Our Interesting Science Experiment
I happened to do a science research on how much weight an eggshell could support. My question to answer was,''Are eggshells strong enough to support books?''
I needed to follow the procedures in order to succeed in the experiment. Below is the procedures which I put in my own words:
1. Using the edge of the spoon, carefully break off the small end of each eggshell. If any cracks form up the side of a shell, throw it away and use another egg.
2. Shake out the yoke of each eggshell into a bowl.
3. Wash the inside of the egg out carefully with water.
4. Gently dry the outside of the shells with paper towels.
5. Wrap a piece of tape around the center of each shell, putting the tape the same on each shell.
6. Use the nail scissors to cut away the broken ends around the bottom of the tape of each shell.
7. Put the shells, open end down, in a rectangular shape on a table.
8. Carefully place one book on top of the shells and position the shells so that one is under each corner of the book.
9. Carefully add the other books, one at a time, to the book on top of the eggshells, waiting thirty seconds before adding each book. Keep adding books until one or more eggs crack. Record the number of books needed to cause the collapse.
10. Use the bathroom scale to weigh the books required to cause one or more of the shells to crack.
Taking a look at the procedures of the experiment I wrote, I listed down the materials I had to have:metal spoon, masking tape, 4 raw eggs in their shells, bowl, water, paper towel, nail scissors, several books, bathroom scale
Right when I started gathering all the materials, my friend Katherine told me that I had to make a hypothesis first. So I made a hypothesis: If I place 4 books on top of the eggshells, then the eggshells will crack.
After that, Kathy and I gathered the materials and we repeated the experiment 3 times to be exact. I did trial 1 and 2, and Kathy took the pictures to show proof we did it. Kathy did trial 3 and Kathy's family took pictures for that one. We recorded our data: Trial 1- 6kg, Trial 2- 9kg, and Trial 3- 12 kg.
Our math teacher, Mrs. Arti, told us that we had to find the average weight the eggshells could hold. So I used my math skills to figure out: 6+9+12/3=9kg. We made a neat bar graph and a chart showing our results for trial 1, 2, 3, and the average.
We wrote our conclusion carefully:
Our hypothesis for the experiment was that if chapter books, picture books, magazines, and almanacs were placed on eggshells, the eggshells will hold 4 chapter books which will be 1.4 kilograms. After conducting our experiment three times, the eggshells held and average of nine kilograms. Our results showed that eggshells are not delicate as we thought, and our hypothesis was inaccurate. Next time, we would like to put other things such as folders while conducting the experiment and use the exact same size of the eggshells. Our results are important because an architect might need to make a structure that can hold heavy loads. Maybe then she could make the bottom of the building with arches like an eggshell.
Finally, we made a science display board with all the important information and details. It was really rewarding to see our science display board distributed in our school elementary library.
Doing all this work was a really good experience and helped me get in better relationships with my friend Kathy. This project was really an honor since we got a science achievement award certificate also.