• The Rock Cycle's Three Main Rock Types: The video explains the three major rock types—igneous (formed from cooling magma or lava), sedimentary (formed from weathered and compacted sediments), and metamorphic (formed from existing rocks under heat and pressure)—and their interrelationships within the rock cycle. The processes involved in transforming one rock type into another are highlighted. • Transformative Processes in the Rock Cycle: The video details the processes that transform rocks: Weathering, erosion, deposition, compaction, and cementation (W.E.D.C.C.) create sedimentary rocks; heat and pressure create metamorphic rocks; and melting and cooling create igneous rocks. Terms like lithification (compaction and cementation) and metamorphism are also explained. • Rock Cycle Interconversions: The video illustrates how each rock type can transform into another type (or even remain the same type through processes like re-compaction). For example, sedimentary rocks can become metamorphic rocks through heat and pressure, and metamorphic rocks can become igneous rocks through melting and subsequent cooling. The differences between intrusive and extrusive igneous rocks are also explained, based on where cooling occurs.
Free Worksheet covering " The Rock Cycle"
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