UNIT 5
EARTH'S STRUCTURE
ATMOSPHERE
What is above us?
Three main spheres of our
planet; atmosphere,
exosphereand, hydrosphere.
●
LAYERS OF THE
ATMOSPHERE
-Troposphere: closest to
Earth's surface, a lot of
oxygen, weather occurs here.
-Stratosphere: ozone layer
absorbs the harmful ultraviolet
radiation from the sun.
-Mesosphere: meteors burn in
this layer, the top of the is the
coldest part of the atmosphere.
-Thermosphere: temperature is
very high because solar activity
influences it.
-Exosphere: is the outermost
layer. The satellites orbit Earth.
AIR COMPOSITION
Az* : 78%
Na*: 21%
Am*: 1%
*nitrogen
*oygen
*carbon dioxide, water
vapour, anrgon and ozone
GEOSPHERE
What is solid part of the
Earth?
The Geosphere is the solid
sphere of our planet. It has
three main parts:
●
1. Crust: surface of the Earth.
2. Mantle: the thickest layer of
the Earth.
3. Core: the hottest layer of the
Earth.
HYDROSPHERE
What is all of Earth's water
located?
Ocean, lakes, rivers, swamps,
glaciers, ice caps.
●
What are the processes of the
water cycle?
1. Evaporation: liquid water
becomes water vapour.
2. Transpiration: plants absorbs
water from soil through the
roots. Water escapes into the air
as water vapour.
●
3. Condensation: gas is changedc
into liquid.
4. Precipitation: water falls from
the air as rain, hail or snow.
5. Surface run-off:
Water from precipitation runs off
the surface of the Earth into lakes,
streams, rivers and oceans.
6. Infiltration: some water
infiltrates through porous land
surface into the ground and
recharges ground-water
aquifers.
The
End
By: Juan Carlos Frías Arenas