The Naked Egg Experiment
First, we put a raw egg in a "beaker" and covered it with vinegar. The hypothesis is that the vinegar will dissolve the outer membrane (egg shells), leaving behind the inner membrane to keep the egg whole and protected. We would also like to know if the inner membrane is permeable.
First, we put a raw egg in a "beaker" and covered it with vinegar. The hypothesis is that the vinegar will dissolve the outer membrane (egg shells), leaving behind the inner membrane to keep the egg whole and protected. We would also like to know if the inner membrane is permeable.
Then, we waited...
Overnight...
Overnight...
The next day, we were able to check out the continuing effect vinegar on the eggs.
Students expected the eggs to feel:
Slimy, Hard, Gooey, Rough, Squishy...
Students expected the eggs to feel:
Slimy, Hard, Gooey, Rough, Squishy...
What we discovered:
Upon first touching the eggs, students felt the eggs were:
Furry, Slippery, Hard Boiled, Soft, Bubbly, Like a Balloon...
Upon first touching the eggs, students felt the eggs were:
Furry, Slippery, Hard Boiled, Soft, Bubbly, Like a Balloon...
After taking a risk and gently squeezing the eggs, student felt the eggs were:
Full of Liquid, Firm, Grape-Like, Water Balloon...
Full of Liquid, Firm, Grape-Like, Water Balloon...
1st Results
Did the vinegar dissolve the egg shells?
Yes! The egg shells are beginning to dissolve and we are able to see the yellow yolk inside the egg.
Is the outer egg membrane permeable?
Yes! The eggs feel full of liquid like a water balloon. We don't think the insides of the egg would feel as full without having absorbed some of the vinegar. Also, the eggs look to have grown bigger in size, thus leading to the idea that the outer membrane is indeed permeable as some of the vinegar was absorbed.
Let's see what happens tomorrow!!
Did the vinegar dissolve the egg shells?
Yes! The egg shells are beginning to dissolve and we are able to see the yellow yolk inside the egg.
Is the outer egg membrane permeable?
Yes! The eggs feel full of liquid like a water balloon. We don't think the insides of the egg would feel as full without having absorbed some of the vinegar. Also, the eggs look to have grown bigger in size, thus leading to the idea that the outer membrane is indeed permeable as some of the vinegar was absorbed.
Let's see what happens tomorrow!!
2nd Observations
We noted that the eggs feel pretty much the same, but have grown a little more in size.
2nd Egg-speriment - New Solutions
Salt Water Solution Hypothesis: Due to homeostasis, we feel the egg will shrink is size as it will release much of it's vinegar.
Corn Syrup Solution Hypothesis: We think the egg will swell even more in size and become sticky.
We noted that the eggs feel pretty much the same, but have grown a little more in size.
2nd Egg-speriment - New Solutions
Salt Water Solution Hypothesis: Due to homeostasis, we feel the egg will shrink is size as it will release much of it's vinegar.
Corn Syrup Solution Hypothesis: We think the egg will swell even more in size and become sticky.
Naked Egg Experiment - Day 5
After soaking 3 eggs in a saltwater solution and 2 eggs in corn syrup, this is what we found:
The saltwater eggs seemed to stay about the same in size, but the inside now looks white and swirly, like it's maybe absorbed some of the salt. The white parts inside seem to be separate from the clear parts. One of the salt water eggs popped and some of the while that came out looked very thick.
The corn syrup eggs really shrank! They look saggy and deflated. The albumen is clear, too. They seem to have released the vinegar because the corn syrup is not as thick and it smells like vinegar.
After soaking 3 eggs in a saltwater solution and 2 eggs in corn syrup, this is what we found:
The saltwater eggs seemed to stay about the same in size, but the inside now looks white and swirly, like it's maybe absorbed some of the salt. The white parts inside seem to be separate from the clear parts. One of the salt water eggs popped and some of the while that came out looked very thick.
The corn syrup eggs really shrank! They look saggy and deflated. The albumen is clear, too. They seem to have released the vinegar because the corn syrup is not as thick and it smells like vinegar.
We have placed 2 of the saltwater eggs into the corn syrup solution and left 1 egg in the saltwater solution. Let's see what happens over the weekend!!
Over the Weekend...
The eggs were left to sit over the weekend in either salt water or corn syrup. We found that the eggs in the corn syrup had shrunk in size, just like before, releasing vinegar. We also found that this vinegar diluted the corn syrup and floated on top of the corn syrup as it is lighter in weight and viscosity. The egg left in the salt water really remained the same.
Final Experiment
For our final experiment, we placed the eggs in plain water and added a little food coloring. It is our hypothesis that the eggs will maintain homeostasis by taking in some of the water. We will be able to observe this change by the increase in size of the eggs. Additionally, if the eggs take in the water, they will also take in food coloring, further giving proof of the eggs maintaining homeostasis by taking in the water.
The eggs were left to sit over the weekend in either salt water or corn syrup. We found that the eggs in the corn syrup had shrunk in size, just like before, releasing vinegar. We also found that this vinegar diluted the corn syrup and floated on top of the corn syrup as it is lighter in weight and viscosity. The egg left in the salt water really remained the same.
Final Experiment
For our final experiment, we placed the eggs in plain water and added a little food coloring. It is our hypothesis that the eggs will maintain homeostasis by taking in some of the water. We will be able to observe this change by the increase in size of the eggs. Additionally, if the eggs take in the water, they will also take in food coloring, further giving proof of the eggs maintaining homeostasis by taking in the water.
Final Results!
After allowing the eggs to sit in plain water with food coloring overnight, what we found was amazing! The eggs had indeed maintained homeostasis by taking in water. The proof of this was in the increased size of the eggs and their beautiful change in color! Even the egg that was already large in size from having soaked in the saltwater had taken in the food colored water and turned a spectacular emerald green. This was such a fun experiment and we encourage you to try it at home :)
After allowing the eggs to sit in plain water with food coloring overnight, what we found was amazing! The eggs had indeed maintained homeostasis by taking in water. The proof of this was in the increased size of the eggs and their beautiful change in color! Even the egg that was already large in size from having soaked in the saltwater had taken in the food colored water and turned a spectacular emerald green. This was such a fun experiment and we encourage you to try it at home :)
