7.4 SIENCEGeology

Humus-decaying Soil

Minerals1.Never Man Made

2 made with the same kind of Atoms3.Atoms are in an orderly fashion

Geologists- Studies the earth

Crystals-substance having smooth, flat surface

Topsoil-upper layer of soil

Subsoil Layer under the topsoil

Bedrock layer below subsoil

Crust 5 miles of solid rock below the soil.

Magma layer beneath the crust