THE STRUCTURE OF THE EARTH

THE EARTH

• Planet Earth can be divided into three areas well differentiated by the state of its matter.

Atmosphere

• A layer of air surrounding the earth.It works as a protective shield for the planet.

GEOSPHERE

• The solid and superficial part of the Earth encompassing the continents and seabed.

HYDROSPHERE

• Made up of all the water present above and below the Earth.

HYDROSPHERE

OCEAN WATERS

• Seawater, or salt water, is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of about 3.5% (35 g/L, 599 mM).

INLAND OR CONTINENTAL WATERS

• The are located within the continents.They are rivers,streams,lagoons,lake and groundwater.(these are mostly fresh water)

ATMOSPHERIC WATERS

• These may be in the form of steam or tiny droplets that form clouds.They represent a very small fraction off the total amount water.

THE HYDROSPHERE:ENVIRONMENT OF THE FIRST LIVING THING ON THE PLANET

• In the beginning,the temperature of the planet was much higher than it is today,since it had not cooled enough,and high concentrations of CO2 have a green house effect.

HYDROSPHERE

ATMOSPHERIC WATERS

CYANOBACTERIA

INLAND OR CONTINENTAL WATERS

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