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summary notes on minerals, rocks
summary notes on minerals, rocks

... Mineral - any naturally occurring, inorganic solid with distinct physical and chemical properties Facts about minerals: All minerals are composed of elements a. element - a substance made up of only one type of atom - a pure substance b. there are over 100 types of elements on Earth - only a few are ...
Notes for plate tectonics unit
Notes for plate tectonics unit

... Intrusive igneous rock forms from cooling magma below the earth’s surface. Because it cools very slowly, it has coarse-grained texture and large, irregular crystals. Extrusive igneous rock is formed from lava above the surface. It cools quickly, so it has small crystals or no crystals. Its texture d ...
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... a. Rated earthquakes according to their _________________ i. _______________: strength of ground motion in a given place b. Not a precise measurement c. Describes how earthquakes affect people, buildings, and the land surface ...
STRUCTURE OF EARTH
STRUCTURE OF EARTH

... One way that mantle peridotites may melt is by plastic flow of large regions toward the surface (i.e., lower pressures). ...
ps 2-7-08 - elyceum-beta
ps 2-7-08 - elyceum-beta

... • Describes why and how continents move ...
Plate Tectonic Test Review
Plate Tectonic Test Review

... • A convergent plate boundary resides off the northern shore of California. • We live on the west side of the boundary on the Pacific Plate. Return to Quiz ...
Volcanos - High View School
Volcanos - High View School

... Volcanoes are often found where the tectonic plates meet. However, volcanoes can also occur over ‘mantle plumes’ – super hot areas of rock inside the earth. Put simply, a volcano is an opening (usually a mountain) in the Earth’s surface from which hot magma, ash and gas can escape. ...
6 - 云南师范大学外国语学院
6 - 云南师范大学外国语学院

... Another type of earthquake, that associated with volcanic activity, is called a volcanic earthquake. Yet, it is likely that even here the energy released may be the result of a relatively sudden slip of rock masses and the consequent release of elastic strain energy. The energy, however, may in part ...
GEOL_2_mid_term_I_ke..
GEOL_2_mid_term_I_ke..

... transported a short distance (32) 1 pt. Linear, magnetic patterns associated with mid-ocean ridges are configured as ________. A) reversed magnetizations along the rift valleys and normal magnetizations along the ridge B) normal and reversed magnetized strips roughly parallel to the ridge C) normal ...
Biological Science - Graves County Schools
Biological Science - Graves County Schools

... Whether observing airplanes, baseballs, planets, or people, the motion of all bodies is governed by the same basic rules. In the elementary years of conceptual development, students need multiple opportunities to experience, observe, and describe (in words and pictures) motion, including factors ( p ...
Grade 7 Science - Octorara Area School District
Grade 7 Science - Octorara Area School District

... B. Diagram the positions of earth and its axis during the solstices and equinoxes. B. Identify the effects of Earth's rotation and revolution. B. Determine the influence of tilt on earth's axis as the cause of seasons. B. Diagram the positions of earth and its axis during the solstices and equinoxes ...
GeologyJeopardy
GeologyJeopardy

... (e.g., folding, faulting, volcanism, sedimentation) and that these processes seen today (e.g., erosion, weathering crustal plate movement) are similar to those in the past. • Describe the processes that formed Pennsylvania geologic structures and resources including mountains, glacial formations, wa ...
4th Six Weeks Plate Tectonics and Topographic Maps Study Guide
4th Six Weeks Plate Tectonics and Topographic Maps Study Guide

... Earthquakes occur most often at transform plate boundaries. Heat from friction of plates sliding past each other causes parts of plates to crumble, forming faults. 8. How does weathering affect land formations, such as islands? Weathering, physical or chemical, causes land to be broken down in time ...
Tectonic Plates Webquest
Tectonic Plates Webquest

... 10. Go to http://www.learner.org/interactives/dynamicearth/slip.html Scroll to the bottom and click on “see what happens at different plate boundaries.” Move your mouse over the words on the diagram to learn more about the different types of boundaries. The first boundary picture is when an ocean cr ...
1 plate tectonics - IES Gabriela Mistral
1 plate tectonics - IES Gabriela Mistral

Geology 101 Origin of Magma From our discussions of the structure
Geology 101 Origin of Magma From our discussions of the structure

... A common answer that people give is that increased temperature will cause a rock to melt. Although this is true, there are two other factors that have an important affect in melting: the pressure on the rock and the amount of water present. In general, thermal energy causes the atoms to move more ra ...
470.02
470.02

... Structures are found at every scale Plate, mountain, outcrop, hand sample, thin section ...
Chapter 2 - Petal School District
Chapter 2 - Petal School District

... one gigantic supercontinent called Pangaea (pan•JEE•uh). The maps on the next page show that over millions of years, this supercontinent has broken apart into smaller continents. These continents in turn have drifted and, in some places, recombined. The theory that the continents were once joined an ...
The Dynamic Earth – Plate Tectonics
The Dynamic Earth – Plate Tectonics

... hot magma rises up, cools and solidifies, forming new basalt ...
Science 3360 - Kennesaw State University | College of Science and
Science 3360 - Kennesaw State University | College of Science and

... In 1908, Wegener read a paper on the similarities of fossils in North America and Europe. From this paper, Wegener pieced together evidence from a broad range of the Earth sciences to hypothesize that: All of the present-day continents were once part of a single supercontinent called Pangaea About 2 ...
Earth`s Layers Worksheet - Engineering Service Learning
Earth`s Layers Worksheet - Engineering Service Learning

... o Intro : Did you know that Earth has four different layers? These layers consist of the lithosphere, mantle, outer core and inner core.  The lithosphere is the layer that we live on, the layer that we interact with every day. It consists of the crust and the uppermost mantle. The lithosphere also ...
CHAPTER 13 Denudation, weathering and mass wasting
CHAPTER 13 Denudation, weathering and mass wasting

... The collective processes of denudation appear as just two facilitating links in the sedimentary loop of the rock cycle, between the formation of continental crust and the post-depositional fate of derived sediments. In practice they form the principal element in any review of landsurface development ...
platetectonics
platetectonics

... producing mountains on their leading edges. Geologists at that time understood enough about the strength of rocks to know that this was highly unlikely. Wegener's work was largely unaccepted in the northern hemisphere. In the southern hemisphere, where geologists were familiar with the rocks that We ...
The Earth - WordPress.com
The Earth - WordPress.com

K-Ar age determinations of the Alta
K-Ar age determinations of the Alta

... procedures as well as statistical data calculations are described in Delaloye et al. 1974. Potassium content of rocks with less than O. l% K20 has been measured by isotopic dilu­ tion on a mass spectrometer. This procedure increases the accuracy so that the ages obtained on these rocks also have a 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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