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Section 1 The Earth System
Section 1 The Earth System

... The atmosphere is a mixture of invisible gases that surround Earth. The atmosphere extends outward to about 500 km from the surface of Earth. But most of the atmospheric gases lie within 8 to 12 km of Earth’s surface. Earth’s atmosphere is made up of four layers. Layers in the Atmosphere The troposp ...
chapter_2_powerpoint_le
chapter_2_powerpoint_le

... Origin of the Sun and Planets • Formation of planets – Rings of concentrated matter formed within disk – Particles within rings continued to collide to form planets – Inner planets (Mercury, Venus, Earth and Mars) lost much gas and liquid to solar radiation, becoming rocky (terrestrial) – Outer pla ...
New Research Opportunities in the Earth Sciences
New Research Opportunities in the Earth Sciences

... Hurricane Katrina. Areas covered in vegetation (left) appear less impacted than developed areas (right). Understanding if this was due to the vegetation or to the prescence of higher coastal dunes built through vegetal interactions with sediment has signifcant environmental management implications. ...
Plate Tectonics
Plate Tectonics

... states that Earth’s continents were once ONE large landmass “Pangea” and over time the continents slowly moved apart. • Evidence... ▫ Shape of the Earth’s continents  They look like they fit together like pieces of a puzzle ...
Changes in the Earth and its Atmosphere
Changes in the Earth and its Atmosphere

... • There are many theories about how the atmosphere was formed. • One of these suggests that during the first billion years the atmosphere was mainly CO2 with little or no O2 (like Mars and Venus). There was probably also methane and ammonia. • What process could have created the oxygen? ...
Midterm Possible Essay Questions
Midterm Possible Essay Questions

... 6. Explain the movement of the molecules in the following substances: ice, water vapor, kool-aid. Include an illustration next to your explanation. (pg. 31) Ice- solid, particles are packed tightly together. This makes a solid have definite shape and ...
Section 1
Section 1

... the layer that you live on. The mantle is much hotter and has the ability to flow. The outer core and inner core are even hotter with pressures so great you would be squeezed into a ball smaller than a marble if you were able to go to the center of the Earth! ...
Department of Geophysics Department of Geology and Mineralogy
Department of Geophysics Department of Geology and Mineralogy

... ongoing crustal deformation and earthquakes, with their resultant landforms and geologic structures. We especially focus on inland active faults responsible for epicentral earthquakes and plate-boundary faults which cause mega-thrust earthquakes around ocean trenches. The research aims are to clarif ...
Remote Sensing (RS) and Geographic Information Systems (GIS)
Remote Sensing (RS) and Geographic Information Systems (GIS)

... – The present situation • Major continental landmasses are relatively stable • Major ...
12.13-plate-tectonics
12.13-plate-tectonics

... 2. C- subduction is one plate passing under another 3. B- Hawaii was formed at a hot spot (a weakness in the pacific ocean plate where magma was allowed to leak out) 4. B- see whiteboard 5. E- metamorphic rock is formed at high temp/pressure 6. C- earthquakes occur mostly at transform boundaries ...
Revision summary presentation for C1 Earth Chemistry File
Revision summary presentation for C1 Earth Chemistry File

... or plates rubbing together or plates pushing against each other) (1) any two from: • vibration / (shock)waves (in the earth) or p and s waves (accept sudden jolts / slips) • caused by convection currents (in the mantle) • heat / energy released from radioactive processes ...
Geography Handbook Power Point
Geography Handbook Power Point

... A map is a flat drawing of all or part of the earth’s surface. Maps can show small areas in details as well as other items. ...
Chapter 9: Our Living Earth PowerPoint print-off
Chapter 9: Our Living Earth PowerPoint print-off

... •  Place of maximum surface shaking •  Place directly above the focus The focus is also called the hypocenter ...
Chapter 2
Chapter 2

... Movement of Continents • The idea that continents have traveled great distances over millions of years is known as continental drift. • Theory, developed by Alfred Wegener, states that the continents were once united in a single supercontinent and over time, slowly separated and moved to their prese ...
Geologic Time Scale
Geologic Time Scale

... Geologic events Eras are divided by major mass extinctions Periods further divide time in tens of millions of years ...
What causes Earthquakes? Earthquake Tip 1 Learning
What causes Earthquakes? Earthquake Tip 1 Learning

... like the convective flow of water when heated in a beaker (Figure 2). The energy for the above circulations is derived from the heat produced from the incessant decay of radioactive elements in the rocks throughout the Earth’s interior. These convection currents result in a circulation of the earth’ ...
Unit 5 - Structure and Composition of the Earth
Unit 5 - Structure and Composition of the Earth

... • _______________ - occur when rocks in the earth's crust break due to geological forces created by movement of tectonic plates • _______________ - occur in conjunction with volcanic activity • _______________ - small earthquakes in underground caverns and mines • _______________ - result from the ...
Earth Matters Benchmark Study Topics
Earth Matters Benchmark Study Topics

... Which stress can create hills and valleys or anticlines and synclines? List all of the places you could find faults. Section 2—Earthquakes and seismic waves In which layer of the Earth would you find the focus, or point where the rock breaks and starts the earthquake? ...
GEO 10 Assignment on The Earth`s Internal Structure
GEO 10 Assignment on The Earth`s Internal Structure

... rebounds when pressed down. Vibrations through the layers of the earth are altered by differences in temperature and plasticity. Piecing together evidence from seismic readings, scientists have determined what the interior of the earth is like. Why There Are Layers When the solar system was created ...
No Slide Title
No Slide Title

... • The drifting of the continents shaped the world we live in today. ...
Chapter 28 Notes
Chapter 28 Notes

...  Geology is the study of rocks and materials that make up Earth and the processes that shape it.  In 1666, Nicholas Steno (1638-87) noticed that shark’s teeth resembled mysterious stones called “tonguestones” that were found in local rocks.  Steno’s explanation helped him develop ideas about how ...
Earth`s Interior and Geophysical Properties
Earth`s Interior and Geophysical Properties

... Deep parts of the Earth are studied indirectly through Geophysics. Geophysics includes the study of seismic waves and the Earth’s magnetic field, gravity and heat. Evidence From Seismic Waves Seismic Reflection - the return of some of the energy of seismic waves to the Earth’s surface other the wave ...
ch 3 PowerPoint
ch 3 PowerPoint

... because the molecules are so far apart, nitrogen and oxygen absorb x-rays and gamma rays, the lower thermosphere is called the ionosphere, this is where the aurora borealis and australialis are. ...
Chapter 17 Study Guide 16
Chapter 17 Study Guide 16

... 13) What takes place in the asthenosphere to cause the plates to move? ____________________________________________________________________________________ convection currents → heated material rises, cools, and sinks back down ________________________________________________________________________ ...
Earth Science Study guide answers
Earth Science Study guide answers

... GALAXY: A group of stars, gas and dust held together by gravity ...
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Spherical Earth



The concept of a spherical Earth dates back to around the 6th century BC, when it was mentioned in ancient Greek philosophy, but remained a matter of philosophical speculation until the 3rd century BC, when Hellenistic astronomy established the spherical shape of the earth as a physical given. The paradigm was gradually adopted throughout the Old World during Late Antiquity and the Middle Ages. A practical demonstration of Earth's sphericity was achieved by Ferdinand Magellan and Juan Sebastián Elcano's expedition's circumnavigation (1519−1522).The concept of a spherical Earth displaced earlier beliefs in a flat Earth: In early Mesopotamian mythology, the world was portrayed as a flat disk floating in the ocean and surrounded by a spherical sky, and this forms the premise for early world maps like those of Anaximander and Hecataeus of Miletus. Other speculations on the shape of Earth include a seven-layered ziggurat or cosmic mountain, alluded to in the Avesta and ancient Persian writings (see seven climes).The realization that the figure of the Earth is more accurately described as an ellipsoid dates to the 18th century (Maupertuis).In the early 19th century, the flattening of the earth ellipsoid was determined to be of the order of 1/300 (Delambre, Everest). The modern value as determined by the US DoD World Geodetic System since the 1960s is close to 1/298.25.
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