EARTH Crossword Puzzle
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QUESTIONS LIST:
- mineral : a naturally occurring, pure chemical substance.
- ore : minerals deemed valuable.
- luster : how light reflects off the surface of a mineral.
- granite : a type of intrusive igneous rock.
- obsidian : a type of extrusive igneous rock.
- sedimentary : a type of rock when sediments are compacted.
- metamorphic : a type of rock when igneous rocks are under heat and pressure.
- igneous : a type of rock when magma is melted.
- compaction : the squeezing of sediment by the weight of overlying layers
- berosion : the transport of sediments by wind or flowing water.
