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My Science Project

Across
Solid substances that occur naturally
When sand, mud and pebbles get layed down over time layers are squashed turning into this
Naturally occuring solid material
Down
A transformation of a preexisting rock
Force over a unitcaused by the weight of the atmosphere on earth
Solidified from molten earth material
The softest material in the world
How light interacts with the surface of a crystal
A measure of hard a material is
Hardest material in the world