What are rocks made of?

Which type of rock can be formed by heat?

How may sedimentary rocks be formed?

What main group of rock can be formed from rock which has undergone a change?

A shiny, black igneous rock form which Indians made arrowheads

Beautiful metamorphic rock from which the Lincoln Memorial is made

igneous rock from which most of the earth's crust under the continents is made

Sedimentary rock that can be used for writing & the metamorphic rock that is written on

Sedementary rock made from mud

Igneous rock that floats

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