Question

1 I am a metamorphic rock dark grey in colour. I am used to make roofs and blackboards.​

Answer 1

Answer:

Slate is your answer .

Explanation:

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Answer 2

Answer:

Slate

Explanation:

Slate is a metamorphic rock that is formed when shales and clays are put under great pressure and heated inside the earth for millions of years. Like shale, it splits apart into sheets, which means that it has good cleavage. Slate is usually gray or black and is used to make blackboards and roofing tiles.

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