Sources of Energy in the Earth System

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Sources of Energy in the Earth System
Internal Heat Flow 6.6 x 1017 cal (0.018)
Energy Interacts With Matter - Change Occurs
Tides 0.6 x 1017 cal (0.002)
External Energy Sources
Crescent Sun
Total amount reaching Earths surface every 24
hours Energy Estimates from Flint and Skinner,
1977)
Sun 37,000 x 1017 cal (99.98)
NASA Solar System Exploration
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Earth Processes Driven by two heat
engines Internal - Heat Flow - 6.6 x
1017 cal (0.018) External - Solar Radiation -
37,000 x 1017 cal (99.98) Tides
0.6 x 1017 cal (0.002) (Total
amount reaching Earths surface every 24 hours)
Amounts of energy available from different sources
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External Heat Engine Driven by energy from
the sun Drives the physical processes of the
atmosphere and hydrosphere
The Model for the Earth is a GreenHouse!!!!
Diagram to help explain the process of global
warming and how greenhouse gases create the
"greenhouse effect" www.eecs.umich.edu/mathscienc
e/funexperiments/agesubject/lessons/images/diagram
page.html
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Earths External Energy Budget
Inflow Outflow
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Earths Internal Heat Engine Drives the
dynamic processes of the geosphere - driving
force for on-going catastrophic events such as
earthquakes and volcanic eruptions - creates
an irregular distribution of heat flow at the
surface to the Earth
Global Heat Flow Map, Pollack and others, 1993,
http//www.geo.lsa.umich.edu/hpollack/globalq.htm
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Earths Internal Heat Engine - Sources Primordi
al Processes - (1) extraterrestrial impacts
(2) gravitational contraction of the Earth's
interior. Radioactive Decay (3)
unstable isotopes Processes
Please Read THE EARTH'S INTERNAL HEAT ENERGYAND
INTERIOR STRUCTURE
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EXTRATERRESTRIAL IMPACTS
From NASA Archives
Primordial Heat Sources
From NASA Archives
Meteor Crater, Arizona
GRAVITATIONAL CONTRACTION
http//astrogeology.usgs.gov/Projects/BrowseTheSol
arSystem/gifs/moon2.gif
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Radioactive Decay Unstable isotopes.
The spontaneous emission of radiation, generally
alpha or beta particles, often accompanied by
gamma rays, from the nucleus of an unstable
isotope.
(Gamma Rays -Electromagnetic Radiation)
U.S. Nuclear Regulatory Commission
(alpha or beta particles)
Learning More About Radiation Radioactivity
Click Here
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Where does the internal energy go?
Go to the Sources of Earths Energy folder, print
out Earth Plate Puzzle I and II. Cut out the
pieces and put the puzzle together. (Source
FEMA K-6 Earthquake Curriculum, 2000)
Global Heat Flow Map, Pollack and others, 1993,
http//www.geo.lsa.umich.edu/hpollack/globalq.htm
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Compare the puzzle to the Heat Flow Map above!
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Where does the internal energy go?
Compare the puzzle to the map of tectonic plates
above!
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Where does the internal energy go?
Compare the puzzle to the Earthquake Occurrence
Map below. What is the relationship between
heat flow, earthquakes, and the puzzle pieces?
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Where does the internal energy go?
Compare the puzzle to the active volcanoes map
below. What is the relationship between heat
flow, active volcanoes, and the puzzle pieces.
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Where does the internal energy go?
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Where does the internal energy go?
How does energy get transferred?