Friday, October 1, 2010

Bronxville Science Students at Work

In Chem II Honors, Luke is identifying some of the physical properties of a variety of substances. Here he observes the magnetic properties of iron filings.

AP Biology students are examining the phenomenon of osmosis and the effect of a synthetic membrane on the movement of water into or out of a cell. The dialysis bags were filled with various strength sugar  (1M, 0.8M, 0.6M, 0.4M, and 0.2M) solutions  and then placed in distilled water. The students noted the mass of the bags before and then after the bags were immersed in the distilled water for 30 minutes.

AP Biology students, David and Brad, are determining the water potential of potato samples by measuring their mass change in various sugar (1M, 0.8M, 0.6M, 0.4M, and 0.2M) solutions.

Chem II Honors students, Claudia and Jack, analyze their observations of the physical properties of various substances.

Chem II Honors student, Luke points out how the iron filings are attracted to the magnet.

In Chem II Honors, "Big Henny" shows the proper technque needed to assess if a particular solid substances will react with a specific liquids using a spot plate.

Forensics' students collate their data for the Maggots and Murder Lab in which they studied four cases by measuring the "maggots" found on the corpses and estimated a TOD (time of death) based on the species present and their growth.

Devon and Kyrie measure the length of their "maggots" while Michael tabulates their data.

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