Alright, now we're rolling! In show #3 we examined some of the features of rocks and how they are formed. Our New York State Earth Science Reference Tables come in very handy... particularly pages 6 & 7! In this episode, we examined similarities and differences between igneous, sedimentary, and metamorphic rocks. They basically differ in their method of formation. Generally speaking, igneous rocks form by the solidification of lava or magma, metamorphic rocks form from heat and pressure applied to preexisting rocks, and sedimentary rocks form by one of several processes; the compaction and cementation of sediments, the chemical precipitation of minerals from evaporating water, or from the remains of once-living organisms.

Here are some helpful links that will add to the content of this episode:

1) http://en.wikipedia.org/wiki/Rock_(geology)
2) http://www.fi.edu/fellows/fellow1/oct98/create/index.html
3) http://edtech.kennesaw.edu/web/rocks.html

Our podcast feed: http://www.cvcsd.stier.org/Podcast/mbreed/Secure/Uploads/lgdtesci.xml