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2PlateTectonicsPowerPoint4
2PlateTectonicsPowerPoint4

... – Sea floor slowly spreads apart. ...
Geologic History
Geologic History

... level (deposition – under water) 2. Erosion – some time after 3. Submergence (subsidence) below sea level 4. Deposition – new sediments deposited on top of the buried eroded surface ...
Integrated Science Chapter 19 Notes Section 1: Earth`s Interior and
Integrated Science Chapter 19 Notes Section 1: Earth`s Interior and

... • Earthquakes generally occur at the boundaries of tectonic plates, where the plates shift with respect to one another ⇒ As the plates move the rocks along their edges experience immense pressure ⇒ When the pressure is great enough the rocks break along the fault line, and the energy is released in ...
Composite Volcanoes - Wallkill Valley Regional High School
Composite Volcanoes - Wallkill Valley Regional High School

... The Earth is composed of four different layers. The crust is the layer that you live on, and it is the most widely studied and understood. 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 sm ...
Earths History - Jefferson County School District
Earths History - Jefferson County School District

... Essential Questions: Why and how do we divide time into units of geologic time? How do plate tectonics affect the Earth’s landscape? How are we able to determine Earth’s age? How is energy involved in the movement of the Earths tectonic plates? How are scientific inquiry and knowledge useful in solv ...
Important Vocabulary Terms: Match them with definitions below
Important Vocabulary Terms: Match them with definitions below

... 19. Where do you find magma and where do you find lava? Magma in the Earth, Lava outside the crust ...
File - Science Source
File - Science Source

... Plate Tectonics Worksheet ...
mantle - Uplift Mighty Prep
mantle - Uplift Mighty Prep

... • As the Earth began to cool, the materials began to separate because of their densities. What do you think happened to the more dense materials during the separation? What about the less dense materials? ...
Plate Tectonics and Layers of the Earth Essential Vocabulary
Plate Tectonics and Layers of the Earth Essential Vocabulary

... Around inner core liquid iron/nickel Layer between crust and core Thin solid outmost layer of the Earth Made of the crust and upper rigid mantle Hot solid flowing rock on which the plates move Strong lower mantle just above the core Pieces of lithosphere that move Theory that continental have change ...
Ch. 10 Earth Science Study Guide The youngest rocks on the ocean
Ch. 10 Earth Science Study Guide The youngest rocks on the ocean

... Alfred Wegener’s analysis of the similarities of these layers led to the conclusion that a. continental plates c The five land masses were once joined float on top of . together in a single landmass molten mantle b. ...
Script - FOG - City College of San Francisco
Script - FOG - City College of San Francisco

... world’s volcanoes, major earthquakes, and major mountains, we have to look more closely at the layers of the Earth, first discussed in the lecture on Earth Formation. Let’s review the basics. First, due to density separation, the core, mantle, and crust – the primary compositional layers – were form ...
Continental Drift and Sea Floor Spreading
Continental Drift and Sea Floor Spreading

... Explain how the lithosphere is divided into plates that are in motion (compression, tension, and shearing) with respect to one another (because of convection currents in the mantle). ...
Yr9 Revision Geography 2016 June
Yr9 Revision Geography 2016 June

... either directly or indirectly, take part in governing. The word democracy originates from Greek, and means rule of the people. The government may set few controls on the economy to ensure it runs successfully (tax, interest rates) ...
8.2: Continents change position over time
8.2: Continents change position over time

... 8.4: Plates converge or scrape past each other ...
Geography 1000 - SmartMap.us Home
Geography 1000 - SmartMap.us Home

... e. All of the above are equally likely to be found at the surface of the Earth’s crust Igneous crystal that reach the surface of the earth eventually erode and crumble into dust, or other fragments that eventually settle and compress into layers of sediment. Because of solar and water processes, ign ...
Earth Science, 10th edition Chapter 6: Earthquakes and Earth`s
Earth Science, 10th edition Chapter 6: Earthquakes and Earth`s

... a. Absence of P waves from about 105 degrees to 140 degrees around the globe from an earthquake b. Explained if Earth contained a core composed of materials unlike the overlying mantle 4. Inner core a. Discovered in 1936 by noting a new region of seismic reflection within the core b. Size was calcul ...
Metamorphic Rock
Metamorphic Rock

...  Rocks are pushed back towards the mantle. • Heat and pressure increase. ...
Plate Tectonics
Plate Tectonics

... These boundaries are created when plates move apart and new material is added to the Earth’s crust. An example is the Mid-Atlantic Ridge. ...
Name - Cedar Hill ISD
Name - Cedar Hill ISD

... Continental Drift: ...
19.1 Earthquakes
19.1 Earthquakes

... earthquake are called seismic waves. • Every earthquake generates three types of seismic waves: primary waves, secondary waves, and surface waves. • Focus: the point IN earth where earthquake waves originate • Epicenter: the point ON Earth’s surface directly above the focus ...
Project #1: Inversion of multiple geophysical data for composition
Project #1: Inversion of multiple geophysical data for composition

... Project #1: Inversion of multiple geophysical data for composition and thermal structure of the Earth's upper mantle. One of the main challenges concerning the Earth’s upper mantle is the determination of its present-day thermal and compositional structure. This information represents the basis for ...
19.1 Earthquakes
19.1 Earthquakes

... earthquake are called seismic waves. • Every earthquake generates three types of seismic waves: primary waves, secondary waves, and surface waves. • Focus: the point IN earth where earthquake waves originate • Epicenter: the point ON Earth’s surface directly above the focus ...
File
File

... © Copyright 2006. M. J. Krech. All rights reserved. ...
Lecture 27 April 3, 2006
Lecture 27 April 3, 2006

... such parameters for common crustal minerals. The Moho is defined by an abrupt change in P velocity, likely marking a change to ultramafic composition. ...
Name Period _____ Date
Name Period _____ Date

... A _______________________ is a device that detects if an earthquake has occurred. The ____________________________ is a scale used for measuring the intensity of an earthquake. 7. ___________________ are giant waves caused by earthquakes or volcanic explosions. Tsunamis can be detected with an _____ ...
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Age of the Earth



The age of the Earth is 4.54 ± 0.05 billion years (4.54 × 109 years ± 1%). This age is based on evidence from radiometric age dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.Following the development of radiometric age dating in the early 20th century, measurements of lead in uranium-rich minerals showed that some were in excess of a billion years old.The oldest such minerals analyzed to date—small crystals of zircon from the Jack Hills of Western Australia—are at least 4.404 billion years old. Comparing the mass and luminosity of the Sun to those of other stars, it appears that the Solar System cannot be much older than those rocks. Calcium-aluminium-rich inclusions – the oldest known solid constituents within meteorites that are formed within the Solar System – are 4.567 billion years old, giving an age for the solar system and an upper limit for the age of Earth.It is hypothesised that the accretion of Earth began soon after the formation of the calcium-aluminium-rich inclusions and the meteorites. Because the exact amount of time this accretion process took is not yet known, and the predictions from different accretion models range from a few millions up to about 100 million years, the exact age of Earth is difficult to determine. It is also difficult to determine the exact age of the oldest rocks on Earth, exposed at the surface, as they are aggregates of minerals of possibly different ages.
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