dimensions of the earth. shape and composition of the earth poles: slightly flattened equator:...
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Dimensions of the Earth
Shape and Composition of the Earth
POLES: slightly flattened
EQUATOR: slightly bulging
The Earth is composed of a series of spheres. Each sphere has a different composition of materials and is held together by gravity. The spheres of Earth are arranged from least dense (atmosphere)
to most dense (geosphere) depending on how close they are found to the Earth’s center.
Atmosphere
The atmosphere is the least
dense of all the spheres
The atmosphere is composed of 78%
nitrogen,21% oxygen and 1% other gases
and aerosols – suspended solids and
liquids in the atmosphere.
Earth’s atmosphere is broken known into
smaller spheres (zones) with distinct
differences in air temperature and composition. The interface between these zones are called pauses.
RT = Pg. 14
Hydrosphere
The hydrosphere consists of bodies of freshwater and saltwater found on
Earth’s surface including: oceans, lakes, rivers and
streams.
Mostof the hydrosphere(~
70%) is composed of
water (hydrogen/oxyg
en).
Lithosphere
The lithosphere lies
beneath the atmosphere
and hydrosphere.
The uppermost section of the lithosphere is
the crust which is broken up into sections
known as lithospheric or tectonic plates.
RT = Pg. 1
Geosphere
The geosphere is the most
dense of all the spheres
RT = Pg. 10
The geosphere is broken into zones
based on changes in density, pressure and temperature.