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8th Grade Science: 3.3

Across
Igneous rocks that forms when magma cools and hardens while underground
A layer of sedimentary rock
The study that is concerned with the origin, composition, and structure of rocks
Consists of smooth pebbles in hardened sand or clay
Rocks that form under extreme heat or pressure
Most common igneous rock
Term for fuels derived from the remains of once living things
Also known as volcanic rock
Metamorphic rocks that can be cut into thin slabs
Down
Rocks that form from solidified magma
Rocks that form from sediments
Coal tar is another name for this substance
Layers of the ground that are stripped away during coal mining
Well-known chemical sedimentary rock
Sediments created through water evaporation