Vocabulary # 7

Rock = a naturally formed solid in the crust , made up of one or more minerals .

The rock are easy to found but not to take up .

igneous rock = a rock formed when melted rock material cools and hardens .

The igneous rock are cooled intrusive o extrusive .

sedimentay rock = a ock made of bits of matter joined together .

The clay is asediment of shale .

fossil = any remains o impint of living things of the past .

Alots of scientits are find and investigate fossils from dinosaries.

metmorphic rock = a rock formed unde heat and pressue from another kind of  rock.

In the process the original ock does not melt under heat and pressure .

humus = decayed plant or animal material in soil .

Humus is decayed plant or animal mateials .

pollution = adding any harmful substance to earth 's land, water. or air .

Pollution means adding any harmful substance to earth ' s

rock cycle = rocks changing fom one form into another in a never - ending series of processes.

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Ttake alot of  year .he rock cycle never end and