Thursday, October 8, 2015

egg deffution lab

In this lab we were asked "How and why dose a cell's internal environment change, as it's external environment changes"?First we measured the mass and the circumference. Then we put one egg in DI water and one in sugar water. Then after a while we measured the mass and the circumference. Finally we filled in our table.

When the sugar concentration increased the mass and circumference decreased because the water moved from the inside of the cell to the outside of the cell. the sugar caused the change. By making the water move from low concentration inside the cell to high concentration outside the cell. 

 The internal environment changes, as it's external environment changes through passive diffusion. They changed this way because the water inside the egg left and dissolved the sugar, which caused the internal and  external environments to change.

This lad demonstrates how a solution is formed by a solute and a solvent. It also demonstrates how diffusion effects the cell by making it bigger through hypertonic, and how they get smaller through hpnotonic.

What we learned in this lab can apply to everyday life. Vegetables are sprinkled with water at markets because then the water get absorbed into their cells by passing through the cell membrane. Roads are sometimes salted to melt ice because the salt makes the ice dissolve it and then it flows off the road. Then the salt water makes the plants on the side of the road die.

Based on this experiment, I would want to test how long it took for different eggs to shrivel up in sugar water.




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