A student is using images of rocks to make a rock cycle diagram. The table describes the rocks the student is using:

Question

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?

(1 point)
Responses

cooling
cooling

pressure and cementation
pressure and cementation

heat and pressure
heat and pressure

years of erosion
years of erosion
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Answer 1

The correct label for an arrow from the picture of obsidian (an igneous rock) to the picture of slate (a metamorphic rock) would be "heat and pressure." This indicates the process that transforms the original rock (in this case, sediment or shale) into metamorphic rock when subjected to high temperatures and pressures.

So the answer is: heat and pressure.