The rock cycle.

1)Earth's crust began as molten rock.

2)In the beginning, all rocks were fire formed.

3)Volcanoes deliver igneous rocks to the surface.

4)Rocks that forms underground is called intrusive rocks.

5)Rock that forms from igneous rock fragments are called sedimentary rock.

6)Sand that is formed into rock is called sand stones.

7)Layers of coal are formed from living organisms.

8)Limestone is formed from sedimentary rock.

9)Rocks  that have been changed since they first formed are called metamorphic rock.

10)Limestone under great pressure turns to marvel.

11)When metamorphic rock reaches the surface, it weathers and becomes more sediments.