LAYERS OF THEEARTH

Earth has 4 layers Crust Mantle Inner core Outer core

Crust

TWO KINDS OF CRUST Continental crust Oceanic crust

CRUST

Silicon---(28%) Silica(SiO2),(or Quartz)

Silicate ion(SiO4-)

Aluminum(8%) Iron(5%) Calcium(3.6%) Sodium(2.8%) Potassium(2.6%) And Magnesium(2%)

Mohorovic discontinuity

Named after Andrija Mohorovic (1857-1936)

The boundary between the crust and the mantle

Mantle

Very thick layer “Asthenosphere”

Core(Inner and Outer)

Mostly made of molten iron and nickel Responsible of Earth’s magnetic field

Rocks and Minerals

Kinds of rocks

Igneous

Rocks formed from magma that cooled and hardened

Sedimentary

Formed from sediments that accumulate and were compacted due to increase pressure

Metamorphic

Resulted from being exposed to high temperature and pressure and difference chemical reactions

Mineral resources