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Science 7 Unit 5 Planet Earth This book belongs to: Topic 1
Science 7 Unit 5 Planet Earth This book belongs to: Topic 1

... - is formed from sediment (loose material – rock, minerals, plant and animal remains that is layered and compacted together by the pressure of the material above it) stratification is the visible evidence of the layers - cementation - some of the minerals that dissolve with the addition of water, ma ...
!GLG 101-Illustrated Vocabulary-Chapter 16 !Structure of the Earth
!GLG 101-Illustrated Vocabulary-Chapter 16 !Structure of the Earth

... *a portion of the Earth's crust that is thicker and less dense than oceanic crust. Consequently, this type of crust floats at a higher elevation and protrudes above sea level to form continents. !core *the innermost spherical structure of a planet; it is the densest material, probably consisting mos ...
Chapter 12.1 - Evidence for Continental Drift
Chapter 12.1 - Evidence for Continental Drift

...  The continents looked as though they might fit together like puzzle pieces.  The continental shelves actually fit together even better.  The original, supercontinent was named Pangaea by Wegener.  Wegener also realized that other evidence also supported his theory.  There were matching geologi ...
How old is our Earth
How old is our Earth

... eruption C) Stratovolcanoes D) Shield Volcanoes 22. The first formed liquid during partial melting is likely to be more *A) felsic, B) mafic, C) of the same composition as the rock D) can be any of these 23. Pluton in the picture is …. A) Sill *B) Dike C) Stock D) Batholith? ...
2nd 9 Weeks Test Review
2nd 9 Weeks Test Review

... Where can the results of plate movement be seen? At plate boundaries. What evidence supports continental drift? Same rocks and fossils on different contents, puzzle-like fit of the continents, glacial deposits 6. How do scientists know the magnetic field of Earth has reversed itself many times? They ...
2 Precambrian Geology
2 Precambrian Geology

... •Archean cratons consist of regions of light-colored felsic rock (granulite gneisses) • surrounded by pods of dark-colored greenstone (chlorite-rich metamorphic rocks). –Pilbara Shield, Australia ...
plate tectonics
plate tectonics

... - mostly old ...
FCAT Review - Mrs. Shaw's Science Site
FCAT Review - Mrs. Shaw's Science Site

... •Geologists use this to determine the amount of a radioactive element in a rock. They compare that amount with the amount of the stable element into which the radioactive elements decay. •This information in conjunction with the half-life of the element to calculate the age of the rock. •Using radio ...
Lecture 2 - School of Earth and Environment
Lecture 2 - School of Earth and Environment

... • There are currentsZone in the mantle A Subduction • When the currents in the mantle carry one plate down • It melts and volcanoes are produced ...
Science 8—Chapter 13 Vocab PP Less 2 Quiz
Science 8—Chapter 13 Vocab PP Less 2 Quiz

... • rock that forms when sediments become pressed or cemented together or when sediments fall out of solution ...
plate tectonics notes
plate tectonics notes

... The continents were once _______________ and named _______________ which means "all land". About _______________ years ago they broke apart and moved to their current positions. Wegener could not explain how or why this occurred. He thought the continents floated around the Earth’s surface. His theo ...
Ocean Floor
Ocean Floor

... crust. As stated above it occurs at an average depth of about 8 kilometers beneath the ocean basins and 32 kilometers beneath continental surfaces. Mohorovičić was able to use his discovery to study thickness variations of the crust. The deepest well that has been drilled to date was located on the ...
Internal Forces and Their Influence on the Earth`s Surface
Internal Forces and Their Influence on the Earth`s Surface

... to store enough thermal energy to reduce the strength of rock masses in their interiors. Increasing temperature lowers the rock strength exponentially and every rock begins to flow at a certain temperature. This holds for Earth and Venus in particular, which are hot enough for their interiors to be ...
Restless Earth Rock - Madison County Schools
Restless Earth Rock - Madison County Schools

... c. Angular unconformity – layer between horizontal layer and tilted rock layer ...
revised_midterm_guide
revised_midterm_guide

... Regular class time. You must have your ID card for the exam. No books, notes, or calculators will be allowed. Understand  how the Earth was formed (recall the important roles that our position in the solar system and early melting have had in determining the Earth’s overall composition and internal ...
The Layers of Earth
The Layers of Earth

... 1 Earth's surface is covered with water and land. Have you ever wondered what is deep inside our planet? Earth is full of surprises. You could cut a section out of the planet. It would show three distinct layers: the crust, mantle, and core. 2 The first layer is called the crust. This is the surface ...
Rocks and Minerals
Rocks and Minerals

... • Magma rises to the surface, cools and hardens. • Weathering, Erosion and Deposition: • Weathering breaks down rocks into sediment. • Erosion is the movement of that sediment. • Deposition is the process where the sediment is dropped off. ...
- Aboriginal Access to Engineering
- Aboriginal Access to Engineering

... Up and down the west coast of Turtle Island, from Vancouver Island, BC to the southern part of the state Oregon, people tell stories of great battles between Thunderbird and the Whale. The Quileute say that during struggles there is a “shaking, jumping up and trembling of the earth beneath, and a ro ...
Modifying Text Complexity Tools
Modifying Text Complexity Tools

... fjords, kettle lakes, moraines, cirques, horns, etc. were left behind. The heavy weight of the ice deformed the Earth’s crust and mantle. Global sea levels dropped over 330 feet (100 meters) to expose continental shelves in some areas. This caused land bridges to be formed between land masses and al ...
Integrated Science One
Integrated Science One

... earthquakes help scientists learn about the composition of Earth? • In an earthquake-prone area, which earth material – igneous rock or sedimentary rock – would be better for constructing ...
Napoleon - Kawameeh Middle School
Napoleon - Kawameeh Middle School

... What are that the continents fit together like a puzzle, same fossils can be found on 2 different continents, same types of geological formations can be found on 2 different continents? ...
End of topic assessment Unit C1, C1.7
End of topic assessment Unit C1, C1.7

File - Earth Science
File - Earth Science

... They are not made by humans  Minerals are inorganic They have never been alive and are not made up from plants or animals  Minerals are solids They are not liquids (like water), or gases (like the air around you)  Minerals have a definite chemical composition Each one is made of a particular mix ...
blocks of crust are pulled away and one block falls down
blocks of crust are pulled away and one block falls down

... material are moved by natural processes, such as water or wind, from place to place ...
continental drift / plate tectonics test review
continental drift / plate tectonics test review

... 9. The scientist who developed the theory of how the continents move apart was ALFRED WEGENER 10. RIDGE-RIFT SYSTEMS are systems of underwater mountains that have a rift valley running through their centers. ...
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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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