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A Little Geology Lesson - Department of Earth Sciences
A Little Geology Lesson - Department of Earth Sciences

Rocks and the Rock Cycle
Rocks and the Rock Cycle

... • Rocks continually change from one to another! • http://www.learner.org/interactives/rockcyc le/diagram.html great interactive ...
Chapter 10-2 - Seafloor Spreading
Chapter 10-2 - Seafloor Spreading

... Example of a drilling rig at sea. What did the scientists find? Well the research concluded that the age of the rocks become much older in samples found farther from the ridges. This is evidence for seafloor spreading. ...
CHAPTER 18 Volcanism
CHAPTER 18 Volcanism

... are eroded, their roots become (10) _________________. As material is removed from mountains by erosion, the crust slowly rises. This process 6. If the Himalayas continue to grow in elevation at their present rate, known as (11) _________________ . Such crustal movements resulting how tall will Mt. ...
Origin of Planets - University of Texas Astronomy Home Page
Origin of Planets - University of Texas Astronomy Home Page

The Grenville Province
The Grenville Province

... The localized release of energy within the earth's crust. Earthquakes may be too small to be felt, or may cause severe damage. The amount of damage depends in part on how deep within the crust the release of energy takes place. ...
Digging Through the Earth
Digging Through the Earth

... The heat inside of Earth is explained two different ways. First, geologists explain that Earth was formed billions of years ago though many fiery collisions of tiny hot planets. Some of that heat still remains. Second, radioactive decay inside Earth creates new heat. Together, radioactive decay and ...
Tracing rays through the Earth
Tracing rays through the Earth

... • Lower mantle mostly isotropic but D” layer locally anisotropic (currently under investigation) ...
Return
Return

... a large continent called Pangaea. Wegener suggested they broke apart and made today’s continents. Theory says all continents drifted apart and continue to do so. ...
Earth's Structure - Kentucky Department of Education
Earth's Structure - Kentucky Department of Education

... rocks and minerals along the edge of one continent match rocks and minerals along the edge of another continent. ...
Weathering
Weathering

... 2) typical concentrations of radioactive elements in rocks and minerals is in the parts per million (ppm) range (e.g Uranium and Thorium concentration in granite is ~ 5 ppm). 3) the low concentration of radioactive parent and daughter elements can affect how precise an age we can determine. Instrume ...
Inside Earth - cloudfront.net
Inside Earth - cloudfront.net

... _____ 6. The outer core has a higher temperature than the inner core. _____ 7. S-waves cannot travel through the outer core. _____ 8. Radioactive elements break down in the inner core. _____ 9. Ancient meteorites are thought to be similar to Earth’s crust. _____ 10. The core makes up about two-third ...
Test # 2 Study Guide Weathering What is Weathering? - in
Test # 2 Study Guide Weathering What is Weathering? - in

... 2) typical concentrations of radioactive elements in rocks and minerals is in the parts per million (ppm) range (e.g Uranium and Thorium concentration in granite is ~ 5 ppm). 3) the low concentration of radioactive parent and daughter elements can affect how precise an age we can determine. Instrume ...
ESVolcanoes - Cole Camp R-1
ESVolcanoes - Cole Camp R-1

... ▸The lava deposit that remains is described by its Hawaiian name _________, which refers to the sharp, blocky shapes into which the hardened lava breaks.  Sometimes the outer part of a mafic lava flow cools so rapidly that it forms a hardened shell around a liquid interior that flows out, leaving t ...
earthquake - SPS186.org
earthquake - SPS186.org

... Earthquake Damage ...
EMPACTS Lesson Plan - Faculty Web Pages
EMPACTS Lesson Plan - Faculty Web Pages

... Earth’s mantle. Say “under the layer of crust is the mantle and it can flow like liquid when hot enough and with enough pressure, causing the tectonic plates to move, causing mountains, volcanoes, and earthquakes.” Explain to the students that they are going to do an activity together. Explain that ...
tectonic plates
tectonic plates

... - buoyant (less dense than oceanic crust) - mostly old ...
Review Worksheet – Mechanical and Chemical Weathering and
Review Worksheet – Mechanical and Chemical Weathering and

... Directions: Fill in the blanks with the correct choice of word(s) from the 2 lists in the box below. Note: A word may be used more than once. chemical weathering dry hot minerals humid surface area ...
Utah History Ch. 2
Utah History Ch. 2

... earthquakes?  Will we ever have an earthquake again, and if so, how strong will  it be?  Geologists are scientists who study all these questions and more?  They learn  about the history of the earth by studying rocks and land formations.  Geological Eras  The earliest known era has been named the Pr ...
Topic 1 Tectonic
Topic 1 Tectonic

... Volcanic and earthquake hazards affect people Investigate the primary and secondary impacts of in different ways and at contrasting locations. earthquakes in two named locations e.g. Haiti 2010 versus San Francisco. To include reasons for contrasting impacts on people and property. ...
The Physical Setting
The Physical Setting

... center of Earth (2) slightly less, because the person is closer to the center of Earth (3) slightly more, because the person is farther from the center of Earth (4) slightly more, because the person is closer to the center of Earth 2578 Precise measurements of the Earth indicate that its polar diame ...
Task 1 - Shaky Ground
Task 1 - Shaky Ground

... The Earth's inner core is a solid sphere composed mostly of iron. It is about 2,400 kilometers (1,500 mi) in diameter and is believed to be as hot as 6650° C (12000° F). This heat is probably generated by the radioactive decay of uranium and other elements. The inner core is bordered by a liquid out ...
earthquake - Plain Local Schools
earthquake - Plain Local Schools

...  Fire • In the San Francisco earthquake of 1906, most of the destruction was caused by fires that started when gas and electrical lines were cut. ...
Earth Science 2: Earthquakes
Earth Science 2: Earthquakes

Earth`s Interior
Earth`s Interior

... 5. Circle the letter of each sentence that supports Wegener’s hypothesis. a. Some continents match up like jigsaw puzzle pieces. b. Different rock structures are found on different continents. d. Continental glaciers once covered South Africa. 6. Give an example of evidence from land features that s ...
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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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