Transcript PLANET EARTH

PLANET EARTH
WHY EARTH SCIENCE ?
http://www.agiweb.org/education/WhyEarthScience/Why_Earth
_Science.pdf
Geology -8.6, 8.7, 8.8, 8.9, 8.10,8.11, 8.13, 8.14, 8.15
Hydrology/Meteorology/environment - 8.5, 8.12, 8.16,
8.17, 8.18, 8.19, 8.20
Astronomy - 8.21, 8.22, 8.23, 8.24,8.25, 8.26
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Earth – An Integrated Entity
• When we view Earth from space, we see a
beautiful blue oasis set against the vast
blackness. It causes us to realize its
fragility and unity. By studying the
components that comprise Earth, we are
better able to understand how human and
natural activities affect its delicate balance.
How is the Earth like a system?
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Geology - geosphere
Astronomy – space and beyond
Meteorology – atmosphere
Oceanography – part of the hydrosphere
Environmental Science - biosphere
What is the Earth’s structure?
Is it round?
Support your answer with three
reasons.
What are your ideas about the
Earth?
Structure of the Earth
• The Earth is an oblate spheroid. It is composed
of a number of different layers as determined by
deep drilling and seismic evidence (Figure 10h1). These layers are:
• The core which is approximately 7000
kilometers in diameter (3500 kilometers in
radius) and is located at the Earth's center.
• The mantle which surrounds the core and has a
thickness of 2900 kilometers.
• The crust floats on top of the mantle. It is
composed of basalt rich oceanic crust and
granitic rich continental crust.
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WORKS CITED
• http://neic.usgs.gov/neis/states/texas/texas_hist
ory.html
• http://www.agiweb.org/education/WhyEarthS
cience/Why_Earth_Science.pdf
• www.seismo.unr.edu/ftp/pub/louie/
class/100/plate-tectonics.html
• www.physicalgeography.net/fundamentals/10h.h
tml
• www.stemnet.nf.ca/CITE/earthquakes_measure
ment.htm
• www.geo.mtu.edu/UPSeis/waves.html