A student is using images of rocks to make a rock cycle diagram. The table describes the rocks the student is using: Name Type metamorphic slate sedimentary limestone igneous obsidian Which label should the student add to an arrow from the picture of obsidian to the picture of slate? Responses heat and pressure heat and pressure - no response given pressure and cementation pressure and cementation - no response given cooling cooling - no response given years of erosion
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The correct label the student should add to an arrow from the picture of obsidian (an igneous rock) to the picture of slate (a metamorphic rock) is "heat and pressure."
The process involves the transformation of an existing rock into a metamorphic rock, which requires both heat and pressure. In this case, obsidian can be subjected to these conditions over time, resulting in the formation of slate.
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