This document discusses different types of soil layers including topsoil, subsoil, and bedrock. It describes components of soil like minerals, humus, rocks, and how animals and decomposers interact with soil and plants. Different types of rocks that make up soils are also mentioned.

1. TYPES OF SOIL
POOR
FERTILE TOPSOIL
UNIT 9
SOIL LAYERS
ARID
SUBSOIL
BEDROCK

2. UNIT 9
THE SOIL
ECOSYSTEM
ANIMALS EAT PLANT
COMPONENTS OF
SOIL
MINERALS
HUMUS
ROCKS
SLUGS AND SNAILS EAT DEAD PLANTS
HUMUS (DECOMPOSERS)
TUNNELS MADE BY WORM
AIR
WATER
ANIMALS SHELTER

3. ROCKS
SLATE
UNIT 9
MINERALS
GOLD
SALT
COPPERMARBLE
GRANITE