Monday, October 2, 2017
02:30 - 04:15; 105 min. -
AP Environmental Science:
Water molecules-
Chase and I reviewed the basic structure of an atom. We discussed what happens when an atom loses an electron and acquires a charge, and with this information Chase was tasked with determining the charge of some ions. She also examined what happens when an atom becomes radioactive and learned how isotopes are expressed on paper. We then discussed the concept of half-life for radioactive elements. Chase was tasked with calculating the half-life of a Carbon14 atom, over several thousand years. We then discussed the unique properties of the water molecule. We examined how the hydrogen attaches to the oxygen and creates a polarity, which gives water the ability to dissolve other molecules. Chase conducted a water properties lab, where she tested the cohesion, adhesion, surface tension, density, and specific heat of the water molecule. We discussed how these properties contribute to the living planet, and how vital water is to the evolution of living things. Homework: Chapter 2 practice test, 1-14 only.