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Can someone please help me with my review?

1)What grade of metamorphism common rocks are formed in-
--- Is it high grade?

2)What is the name of the most rapid kind of mass wasting is>
-- Weathering?

3)How to tell is a rock is igneous, metamorphic or sedimentary.

4)How to tell the grain size of a rock

5)How to tell if a rock is foliated

6) Which of the following rocks are igneous?
Obsidian, granite, diorite, shale, schist, coquina, rhyolite, slate, gneiss

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