Question about How Does a Chick Breathe Inside its Shell expt
Posted: Wed Feb 10, 2016 7:14 pm
My daughter just collected all her data for the experiment "How Does a Chick Breathe Inside its Shell?" But I have a question about her results-- she has consistency between eggs from different species (store bought chicken eggs, farm fresh chicken, duck and turkey eggs) in that the "fresh" eggs all incorporated more dye then when we saved half of them in the fridge for 2 weeks and then placed them in dye. But we had expected, based on a discussion with the farm owner we purchased fresh eggs from that "aged" eggs- those we had saved in the fridge for a week- should incorporate more dye because the porosity of the shell increases both over time and due to refrigeration. But in the 4 different egg types we tried, with multiple eggs per batch, this never held true. She'll report her results but is it accurate that porosity should increase? Is it possible the egg pores closed when removed from the fridge and placed in the dye at room temp for 24 hours? Is it accurate that porosity should increase? To do a little more research she has now placed some eggs in dye in the fridge and we're leaving them in for a whole week. Thanks for any thoughts on this subject.