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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?

(1 point)
Responses

pressure and cementation
pressure and cementation

cooling
cooling

heat and pressure
heat and pressure

years of erosion
years of erosion

1 answer

The correct label for the arrow from the picture of obsidian (igneous rock) to the picture of slate (metamorphic rock) is heat and pressure.

This is because slate forms from the metamorphism of sedimentary rock (like shale) under conditions of heat and pressure, and while the arrow indicates the transformation from igneous to metamorphic, the process involves significant heat and pressure applied to existing rocks to create a metamorphic rock such as slate.

So, the answer is:

heat and pressure