Question

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

Examples of Different Rock Types
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

heat and pressure
heat and pressure

cooling
cooling

years of erosion
years of erosion

pressure and cementation

Answer 1

The correct label to add to an arrow from the picture of obsidian (an igneous rock) to the picture of slate (a metamorphic rock) would be **heat and pressure**. This is because metamorphic rocks form from existing rocks (either igneous, sedimentary, or other metamorphic rocks) that have undergone changes due to heat and pressure.