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Geology Unit

Across
A thick paste or spread from the ground made by organic material
Plates of rock that cause volcanoes
Thinnest layer of the Earth
Two plates slide against each other in opposite direction
Made from sediment pressed together
Shows that the oldest layer of rock is the last an the youngest layer of rock is the first layer.
Example: when a rock falls off a cliff and breaks (doesn't change anything)
Change of rock by heat and pressure
Convection currents are located here
Forms when lava cools on Earths surface
Made of waxy substance
Made from cooled lava
Located in horizon c
Hardest substance known to man
Down
Thickest layer of the Earth
Forms when magma cools in Earth
The breaking down of rocks
Example: when acid rain hits a rock.
Carried rocks away
Discovered existence of Pangea
Depositing rock
Lighter color and contains leaching
A perserved remain or traces of living things
Has most humus,most fertile, and contains litter
Clay, water silt, sand,animals,air, organic matter