Kirsten Zornado
Evan Mark, Carson Keeley
12/9/14 - 12/12/14
Crayfish Lab/Ocean Lab/Shelled Creature Lab
Purpose: The purpose of this lab was to test and see how crayfish shells reacted to different substances in their water. The main question was: What decreased the force required to break the shell?
Procedure: For this lab’s procedure, we had to gather all of the materials, set the substances up in beakers (plastic or glass depending on the substance), then put the crayfish shells into the beakers at the same time. After that, we just looked at and reported on the conditions of the shells every day for four days.
Pre-Lab Questions:
1:
Crayfish!
2:
www.independent.co.uk/news/science/worried-it-was-only-you-even-crayfish-can-feel-anxiety-scientists-show-9532781.html
3:
Do crayfish get stressed/have nervous systems/feel pain? Are crayfish sentient? How do crayfish react to to pain?
4:
No electrical shock with normal crayfish conditions.
Evan Mark, Carson Keeley
12/9/14 - 12/12/14
Crayfish Lab/Ocean Lab/Shelled Creature Lab
Purpose: The purpose of this lab was to test and see how crayfish shells reacted to different substances in their water. The main question was: What decreased the force required to break the shell?
Procedure: For this lab’s procedure, we had to gather all of the materials, set the substances up in beakers (plastic or glass depending on the substance), then put the crayfish shells into the beakers at the same time. After that, we just looked at and reported on the conditions of the shells every day for four days.
Pre-Lab Questions:
1:
Crayfish!
2:
www.independent.co.uk/news/science/worried-it-was-only-you-even-crayfish-can-feel-anxiety-scientists-show-9532781.html
3:
Do crayfish get stressed/have nervous systems/feel pain? Are crayfish sentient? How do crayfish react to to pain?
4:
No electrical shock with normal crayfish conditions.
Data Table/Observations:
See below images.
See below images.
Conclusion: In the end, we discovered that heat, and pesticides were the most harmful substances to the crayfish shells, just like we thought they would be in our hypothesis.
Error Analysis: In this lab, an error we made was not measuring the mass of the crayfish shells before we put them into the water. We originally wanted to take the mass before and after, but we forgot to take it before, so taking the after was useless, as there was nothing to compare it to.
Error Analysis: In this lab, an error we made was not measuring the mass of the crayfish shells before we put them into the water. We originally wanted to take the mass before and after, but we forgot to take it before, so taking the after was useless, as there was nothing to compare it to.