Today we started an exercise involving characteristic of sea shells. We separated the shells based on structure and size. We discussed their different traits and what kind of environments did they live in. We observed that some seashells had tiny little holes in them and tried to come up with a reason why. Mr Quick told us that these shells were once eaten by special types of shells that eat other shells by using a drill like mechanism on their tongue to poison its prey.
We then started on the Brine Shrimp Lab in class. We put different concentrations of salt in five petri dishes (0, 0.5, 1, 1.5, 2). Then we put twenty to thirty eggs on half a cm of tape. We counted the eggs of each dish. We put the tape on a slide and placed it in the dishes. We would have to weight 24 hours to collect data for which ones survived and which ones did not.
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