vocabulary about earth rock and soil

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

igneous rock a rock formed when melted rock materia cools and hardens.

sedimentary rock a rock made of bits of matter joined together.

fossil any remains or imprint of living things of the past.

metamorphic rock a rock formed under heat and pressure from another kind of rock.

humus decayed plant or animal material in soil.

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

rock cycle rocks changing from one form into anothr in a never-ending series of processes.
illustrate