Question

can u please answer to these questions
1)Marble is a beautiful metamorphic stone that is formed deep underground from the sedimentary rock limestone. Explain the process by which limestone becomes a marble.
2)Sedimentary rock is often laid down in layers. Explain which layer in a rock column will be the oldest.
3) Granite is a rock commonly used for kitchen benches as it contains mulitcoloured, large crystals that are interesting to look. Explain how the igneous rock is formed, in terms of its large crystal size.
4) Pumice and obsidian are both igneous extrusive rocks. Obsidian is classed as a glass whereas pumice is a light rock filled with lots of holes. Compare and contrast the formation of these two types of rock, referring to their density and the gas content of the lava that produces these rocks.
5)Coal is a sedimentary rock that is made from compressed plant material. Explain this process

Answer 1

1 ans is metamorphism

3 ans is that graphite contains a branched chain of carbon components that breaks down in the formation of graphite