PDS APES 5th Period 2009-10

In class on Friday, we talked about Plate Tectonics and the Rock Cycle. For most of us, it was a throwback to middle school science, but there are some key points that are good to review: Plate Tectonics: You can think of the earth like an egg. The shell, like earth’s crust, is the tough [...]

In APES class the past few days we have been discussing the biotic portion of ecosystems.  Today, we shifted gears and began to talk about the abiotic, or nonliving,  parts of an ecosystem and agreed that the components are sun, soil, water, and air.  What we primarily focused on today was the creation of soil. [...]