Earth's Systems and Resources Crossword

This printable crossword puzzle on the topic of Rocks & Minerals has 15 clues. Answers range from 4 to 15 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

The breaking down of rock into smaller pieces
Rock formed when molten (magma/lava) cools and hardens
Rock that forms when rocks are changed into different kinds of rocks by great heat and pressure
Rock that forms from the compaction and/or cementation of sediment
The color of the powdered form of the mineral
When minerals break along smooth, flat surfaces
When minerals break randomly with rough and jagged edges
The way a mineral shines/reflects light
Naturally occurring objects that come from the remains of once living things
The carrying of sediments
Dropping off of sediments
Minerals that are mined because they contain useful metals or non-metals
What is coal, oil, and natural gas formed from?
How easily the mineral can be scratched
What is not always a reliable source when identifying a mineral?