• 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
Study Guide for Earth Cycles, Water Cycle, and Moon Phases Test
Study Guide for Earth Cycles, Water Cycle, and Moon Phases Test

... Earth always points to the North Star ...
Earth Systems and Cycles Study Guide
Earth Systems and Cycles Study Guide

... 2. Know that Earth can be divided into 4 spheres (or 4 separate systems). a. Geosphere – consists of the crust, mantle, and core. i. Where tectonic plates converge, diverge and subduct ii. Part of the planet where the rock cycle occurs b. Atmosphere – the gaseous layer above the Geosphere. i. Energy ...
Plate Teconics Study Guide
Plate Teconics Study Guide

... 1. Describe the three compositional layers of the earth. 2. Describe the five physical layers of the earth. 3. Explain Wegner’s theory of continental drift. 4. Name four pieces of evidence that supports the theory of continental drift. 5. What provides us with knowledge about the interior of the ear ...
PHYSICAL GEOLOGY GEOLOGY 1 - UCLA
PHYSICAL GEOLOGY GEOLOGY 1 - UCLA

... designed to provide a broad overview of how the Earth works. The goals of the class are (1) to gain a general understanding of important earth processes (e.g., plate tectonics, Earthquake, volcanism, weathering and erosion, and glaciation) and (2) to learn the knowledge of rocks, minerals, and geolo ...
File
File

... a. solid inner core: 1,250 km thick solid inner core, Temperature = 5500 to 7000 degree C (almost as hot as the sun), Composed of nickel and iron, solid due to extreme pressure b. Liquid outer core: 2,200 km thick liquid outer core, Temperature = 6100 to 4400 degree C, Composed of molten nickel and ...
1 Eons, Eras, Periods and Epochs Dating by radioactive isotopes
1 Eons, Eras, Periods and Epochs Dating by radioactive isotopes

... 1. Nebula: Giant Molecular Cloud (GMC) results from collision(s) or explosion of dying star 3. H and He condense into Sun 4. Disk of matter (many elements) around sun 5. Disk slowly accretes into clumps (planetesimals) that also contain heavier elements 6. planetesimals → planetoids → planets and sa ...
Chapter 13
Chapter 13

... immersed in a molten outer core) surrounded by a mantle of deformable ultramafic rock which is covered by a brittle crust composed of ocean floor mafic rocks and continental felsic rocks. ...
Earth*s Structure
Earth*s Structure

... Physical Structure of Earth •Lithosphere- crust and rigid upper mantle; tectonic plates •Asthenosphere- soft rock of the mantle; how tectonic plates move •Mesosphere- between outer core and asthenosphere •Outer core- completely liquid; iron and nickel •Inner core- solid and dense ...
Chapter 5
Chapter 5

Name
Name

... 6. Cut out each of the scale model slices and mount them on wall. (where designated by the teacher!) 7. Twenty-four of the slices (using the 15 slice produced by the measurements shown on the attached “construction detail” drawing, Figure 1) can be arranged into a complete circle representing a 1:1 ...
la teoria della deriva dei continenti e della tettonica a zolle
la teoria della deriva dei continenti e della tettonica a zolle

... Southern­America,  Southern­Africa, India,  Antartis and Australia ...
Document
Document

... Ring of Fire Seismic Waves Seismogram Tectonic plates ...
Earthquake Vocabulary Part 2
Earthquake Vocabulary Part 2

... The cool, solid outer shell of the earth. It consists of the crust and the rigid uppermost part of the mantle and is broken up into segments, or plates ...
Earth Science Final Exam Study Guide
Earth Science Final Exam Study Guide

The Layer`s Of The Earth!
The Layer`s Of The Earth!

... descend from that point, the temperature rises 1◦C. This rapid rise in temperature continues for several kilometers. After that, the temperature increases more slowly, but steadily. ...
Vocab-Chapter 7 - Wachter Middle School
Vocab-Chapter 7 - Wachter Middle School

... ____________________________ 1. A fault in which the two fault blocks move past each other horizontally. ____________________________ 2. A piece of the lithosphere that moves around on top of the asthenosphere. ____________________________ 3. The theory that the Earth’s lithosphere is divided into t ...
tropical cyclone
tropical cyclone

... over the Earth's surface. The global circulation would be simple if the Earth did not rotate, if the rotation was not tilted relative to the sun, and if Earth had no water. The sun heats the entire Earth, but where the sun is more directly overhead it heats the Earth and atmosphere more. The result ...
Waves inside earth In 1864, Jules Verne wrote A
Waves inside earth In 1864, Jules Verne wrote A

... By studying what happens to the waves on their path through Earth, scientists are able to make detailed maps of Earth’s interior… 1. When S-waves are produced on one side of Earth due to an earthquake, there is a large area on the other side where the waves can’t be detected. 2. Scientists know that ...
The Outer Core - Geography1000
The Outer Core - Geography1000

... The Inner and Outer Core • The Outer Core Molten and extending to a depth of about 3100 miles • The Inner Core • Solid and very dense mass having a radius of 900 miles • Both the inner and outer core are made of iron/nickel or iron/silicate. • Makes up 15% of the Earth’s volume and 32% of its mass ...
Section 1: Earth`s Interior (pages 16 – 24)
Section 1: Earth`s Interior (pages 16 – 24)

... study forces that make and shape planet Earth. Geologists divide forces that change the surface into two groups: 1. Constructive forces – shape the surface by building up mountains and landmasses. Example: The island Surtsey was formed in the Atlantic Ocean from a volcanic eruption. 2. Destructive f ...
The Earth - Indiana University Astronomy
The Earth - Indiana University Astronomy

... Pseudo-color infrared image of the Earth from space. The red areas are warm water during an El Nino event ...
Earth Science SOL Review Facts Word document
Earth Science SOL Review Facts Word document

... Ridges, Rift Valleys, & Volcanoes. Normal faults are produced from this movement.  Transform boundaries slide past each other and strike slip faults and Earthquakes are produced.  Earthquakes can result with any plate movement.  Hot Spots are not related to plate movement.  A fault is a break or ...
Chapter 1: Meet Planet Earth
Chapter 1: Meet Planet Earth

... motion (called kinetic energy) is transformed into heat energy. As Earth grew larger and larger from continual impacts, its temperature increased. Radioactive decay of materials like uranium, thorium and potassium also added heat. Because Earth became partly fluid, less-dense molten materials (silic ...
Theory of Plate Tectonics
Theory of Plate Tectonics

Chapter12 EarthsInterior
Chapter12 EarthsInterior

... rigid form. ...
< 1 ... 349 350 351 352 353 354 355 356 357 ... 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