Earth's Systems and Resources Crossword

What is the hardest mineral on Mohs hardness scale?
Forms when rocks are changed into different kinds of rocks by great heat and/or pressure.
The process that breaks down rocks.
A theory explaining the structure of the earth's crust.
Forms when molten rock cools and hardens.
Forms from the compaction and/or cementation of rock pieces, mineral grains, or shell fragments.
Natural, solid materials found on Earth that are the building blocks of rock.
Minerals that are mined because they contain useful metals or nonmetals.
Natural fuels that come from the remains of living things.
More dense crust is pushed under less dense crust and re-melted into the Earth's Mantle.
When tectonic plates come together or converge.
When tectonic plates move apart.
Places where plates slide sideways past each other.
The physical disintegration of a rock into smaller fragments, each with the same properties as the original.
The process by which the internal structure of a mineral is altered by the addition or removal of elements.