Wednesday, March 26, 2008
Inside the earth
LOOK AT THIS MODEL.. you will be in class drawing and labeling your own earth diagram. More information click here
Thursday, March 20, 2008
VOLCANIC ROCKS
Rocks are aggregates of minerals. Geologists divide rocks into three groups: igneous, metamorphic, and sedimentary. Igneous rocks crystallize from magma. Metamorphic rocks form by the deformation and/or recrystallization of pre-existing rock by changes in temperature, pressure, and/or chemistry. Sedimentary rocks form by weathering and erosion of preexisting rock to make sediment, which is lithified into rock.
VOLCANOES, ROCKS AND SOILS
Friday, March 7, 2008
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