rock & soil crossword

Both coal and diamond are made of _____.
The hardest rock in the world.
A measure of how well soil supports plants growth.
This rock forms from magma and lava when it cools.
This rock is form by extreme heat & pressure.
The process in which an existing rock is changed by heat or pressure- or both.
What rocks are made of.
The original igneous, sedimentary or metamorphic from which a new type of rock is made.
The chemical and physical processes that break down rock at earth's surface.
As you go through the different layers, the color of soil becomes ______.