So today we I began a little review of basic geology we tried to teach you all in 7th grade. We are up against the test, so I’ll handle scribe duties. Remember, I put the Power Point slides in “the box.” We started by reviewing the “anatomy” of the Earth’s interior. Here is a simplified diagram:

Inside the "egg"

Image Source: http://www. scienceclarified. com/landforms/Basins-to-Dunes/Continental-Margin. html

The Theory of Plate Tectonics proposes that about 15 major lithospheric plates “float” on molten rock known as magma (say with best Dr. Evil accent, of course). The heat trapped deep inside the earth creates convection currents on which cause plates to move in different directions. These plates can collide (convergent fault), move apart (divergent fault), or rub (transform fault). The majority of Earth’s volcanic and earthquake activity occurs at these plate boundaries:

The 3 Plate Boundaries

Image Source: http://pubs. usgs. gov/gip/earthq1/plate. html

This constant movement of plates drives the rock cycle. APES students have to know the 3 basic types of rocks (sedimentary, igneous, and metamorphic) and how each can be transformed into the other. Here is a simplified diagram of the rock cycle (we will explore it in depth in class tomorrow):

Rock Cycle

Image Source: http://www. rocksandminerals4u. com/rock_cycle. html

*If you want to know more, there are tons of resources on the web. Here are just a few:

How Earthquakes Work: http://science. howstuffworks. com/nature/natural-disasters/earthquake. htm

How Volcanoes Work: http://science. howstuffworks. com/nature/natural-disasters/volcano. htm

Interactive Rock Cycle Diagram (includes a link to a quiz): http://www. learner. org/interactives/rockcycle/diagram. html

Via:pdsblogs. org

Eco Info
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