• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Guided Notes for Forces Within Earth
Guided Notes for Forces Within Earth

... deformation. This type of strain produces permanent deformation, which means that the material is deformed even if the stress is reduced to zero. ...
Hotspots Unplugged
Hotspots Unplugged

... Its inferred velocity during the period from 81 million to 47 million years ago was more than four centimeters a year, comparable to that of tectonic plates. Corroborating this finding, we found no coral debris at the Detroit or Nintoku seamounts and only a smattering at the Koko seamount. If these i ...
Plate Tectonics Notes
Plate Tectonics Notes

... B. Wegener and the theory of Continental Drift - Alfred Lothar Wegener was a 32 year old german meteorologist - 1912 Published two articles describing a supercontinent called “Pangaea” - explained evidence for dramatic climate shifts (for example, coal deposits in Antarctica) - Also explained why S. ...
Plate Tectonics Notes 2015-2016
Plate Tectonics Notes 2015-2016

... remains in one place as plate above it moves creates chain of small volcanoes no longer active when not over the hot spot Hawaiian Islands--different ages of islands ...
Unit 4 Chapter
Unit 4 Chapter

... In the late 1950’s geologist ___________came up with a new hypothesis. He proposed that the center valley was actually a ridge where molten rock would come to the surface and fill the cracks and push the land away. _____________renamed the process as “Sea Floor Spreading”. Hess’s hypothesizes were p ...
Programme title: Awesome Forces
Programme title: Awesome Forces

... In this programme, students explore the inner workings of our planet. They experience what it is like at the centre of the Earth and uncover the layers of the Earth. Students piece together the puzzle of plate tectonics before investigating the causes of earthquakes and volcanoes. Finally, they disc ...
Why do volcanoes erupt?
Why do volcanoes erupt?

... CCSS.ELA-Literacy.RST.6-8.4 Determine the meaning of symbols, key terms, and other domainspecific words and phrases as they are used in a specific scientific or technical context relevant to grades 6–8 texts and topics. CCSS.ELA-Literacy.RST.6-8.7 Integrate quantitative or technical information expr ...
PowerPoint
PowerPoint

... • C) Seismic reflection at the coremantle boundary • D) Seismic reflection from 660km • E) No earthquakes large enough ...
AUGURY, Reconstructing Earth`s mantle convection
AUGURY, Reconstructing Earth`s mantle convection

... were already there, but the development of computational power and methods was fundamental. Most models were limited in some way – Professor Paul Tackley created a unique tool to partially resolve these problems. After years of appreciating our limitations, we may have given up on the idea of produc ...
THE ROCK CYCLE SIMPLIFIED
THE ROCK CYCLE SIMPLIFIED

... slowly resulting in larger grains of minerals whereas those that crystallize on or above the surface cool quickly resulting in fine grain size or if quenched resulting in glass. There are different names for igneous rocks based on whether it is intrusive or volcanic and its chemical composition whic ...
STUDY GUIDE FOR CHAPTER 1
STUDY GUIDE FOR CHAPTER 1

... Earth’s radiation belts. Same happens for the Jovian planets. Eventually the particles leak out, but they are continuously replaced by new ones. 5. When the particles spiral in near the poles they hit the upper atmosphere and can collide with atoms and molecules there. The electrons in these atoms a ...
EARTHQUAKES
EARTHQUAKES

... EARTHQUAKES ...
Some Common Sedimentary Rocks
Some Common Sedimentary Rocks

...  The rock cycle is the continuous process by which rocks are formed, broken down, and changed into other types of rocks.  Any type of rock---metamorphic, sedimentary, or igneous---can change into any other type of rock.  Fascinating Fact: Up to 100,000 tons of rock a year fall to earth from space ...
Plate tectonics: why only on Earth?
Plate tectonics: why only on Earth?

... fEaturEs platE tECtoNiCs ...
musicalplates
musicalplates

... • A: It is very, very unlikely that our area will experience an earthquake. This is because our area is not near the edge of any tectonic plates. ...
The Lithosphere… - Mr Vincent Science
The Lithosphere… - Mr Vincent Science

... sialic in composition. That is the crust is rich in the elements silicon and aluminium. This type of crust is lower in density than the asthenosphere. Beneath the light coloured grantic rocks is a layer of mafic rocks, mostly gabbro. Continental crust is about 40km thick, but can get up to 65km thic ...
mantle drag
mantle drag

... Plate dynamics • Kinematics = description of motion (rigid rotation or deformation) • Dynamics = forces (stresses) responsible for these motions • Rheology = mechanical properties of Earth’s material, determine their response to stress ⇒ “dynamics = kinematics + rheology” ...
Testing Plate Tectonics & Mechanisms of Plate Motion
Testing Plate Tectonics & Mechanisms of Plate Motion

... Mantle Plumes – hot plumes of rock that are attributed to the upward flowing arms of mantle convection Mantle plumes sometimes show themselves on the surface as hot spots and volcanoes Whole-mantle convection is when slabs of cold oceanic lithosphere descend into the lower mantle, at the same time, ...
Microsoft PowerPoint - file.in [jen pro \350ten\355]
Microsoft PowerPoint - file.in [jen pro \350ten\355]

... The gravel clasts are older than the layer which contains them. The layer containing the gravel must be younger than the layer from which the clasts originate ...
The Mantle
The Mantle

... The crust is what you and I live on and is by far the thinnest of the layers of earth. The thickness varies depending on where you are on earth, with oceanic crust being 5-10 km and continental mountain ranges being up to 30-45 km thick. Thin oceanic crust is denser than the thicker continental crus ...
File - Mr. Medler, Science
File - Mr. Medler, Science

... Density is the amount of anything in a certain space; the quantity of a matter in a given area. Hot liquids are less dense than cold liquids. Currents are a flow of water, air, or any liquid (or gas). Convection currents are circular currents or movement within a liquid (or gas) due to different den ...
Introduction to Structural Geology
Introduction to Structural Geology

... 1.2 Structural geology, tectonics and the use of models Geometric Models -3D interpretations of structures in Earth -based on: mapping, geophysical data -examples: geological maps, vertical cross sections Kinematic Models -prescribe motions that could have carried system from undeformed→deformed sta ...
How and Where Volcanoes Form
How and Where Volcanoes Form

- Schoolnet
- Schoolnet

... 8. Which of these correctly lists Earth’s layers in order from the center to the surface? A. ...
chapter 17 - the earth`s interior and geophysical properties
chapter 17 - the earth`s interior and geophysical properties

... Velocities at 100 km display a pattern consistent with sea floor spreading: hot under the ridges, cold for the rest of the sea floor and continents. At 300 km, the continents are still cold, indicating very deep roots. Some ridges are hot at 100 km but cold at 300 km, while the reverse is true in ot ...
< 1 ... 176 177 178 179 180 181 182 183 184 ... 413 >

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.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report