What type of metamorphic rock was once used to make blackboards because of its ability to split easily into thin sheets along smooth,parallel surfaces?
A)hornfels
B)quartzite
C)schist
D)slate

Question

Quizplus · Accepted Answer

Slate is the correct answer because it is a fine-grained metamorphic rock that can be split into thin, smooth sheets, making it ideal for use as blackboards, roofing, and other applications where its flat, smooth surfaces are desirable.

What Type of Metamorphic Rock Was Once Used to Make