Diego

THE TOP LAYER OF EARTH

DIEGO AGUIRRE

SOIL LAYERS

TOPSOILThe soil is soft. There are roots, insects , moles, fungi and bacteria ( decomposers). It has a lot of humus, air and water

SUBSOILThe soil is hard.There are no living things but some roots of the biggest trees can reach this layer.It has little humus, air and water.

BEDROCKThe soil is very hard. There are no living things.It has very little air and water and no humus.

TYPES OF SOIL

FERTILE• It has a lot of humus and water• Many types of plants grow such us fruit

trees and crops• It is in temperate forest

POOR• It has little humus and water• Only hardly plants grow there such us olive

trees, oaks, vines, etc.• It is in savannahs and Mediterranean

forest.

ARID• It has very little humus and water.• Only very hardly plants can grow such us

cacti.• It is in deserts.

ROCKS AND MINERALS

DEFINITION AND CHARACTERISTICS• Rocks are the solid part of the Earth. Rocks

are made up of minerals• They are non – living things because aren

´t born, don´t grow, don´t reproduce and die. They are natural because people didn´t make them.

ROCKS

• Slate: it is used to make the roff of some homes.

• Granite: it is made up of 3 minerals: quartz,mica and feldespate.

• Marble: it is used for conscuction.

MINERALS

• Gold: we use gold for jewellry.• Salt: we can eat it.• Copper: it is used to make pipes, for

example.