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Plate Boundaries - Valhalla High School
Plate Boundaries - Valhalla High School

... What are the primary rocks which make up the continental and oceanic crusts? continental crust ...
R1 What is geological timescale
R1 What is geological timescale

... R1 Rocks and Landscapes ...
Unit B: Earth Systems
Unit B: Earth Systems

... Unpacking the Standards: What do we want students to Know, Understand and Do (KUD) Unit B: Earth Systems ...
The Earth
The Earth

... • 2. What are earthquakes, volcanoes, and tsunamis? • 3. Where are they located? • 4. Can this information help us figure out how tectonic plates cause earthquakes, volcanoes, and tsunamis? ...
the dynamic crust - Discover Earth Science
the dynamic crust - Discover Earth Science

... a. this suggests that at one time all the continents were one and later broke apart and moved to their present locations b. the west coast of Africa and the east coast of South America is the best example of this 2. Rocks on opposite sides of the Atlantic Ocean “match up” in terms of type, sequence, ...
PSRD: Tungsten Isotopes, Formation of the Moon, and Lopsided
PSRD: Tungsten Isotopes, Formation of the Moon, and Lopsided

... PSRD article: Zinc Isotopes Provide Clues to Volatile Loss During Moon Formation. However, things are not so simple. The isotopes of W and Ti vary throughout the Solar System, so it is reasonable to expect that the giant impact event that formed the Moon would have involved two objects with differen ...
Lecture 1:
Lecture 1:

Ch 3 boundaries, plate techtonics & weathering Slides
Ch 3 boundaries, plate techtonics & weathering Slides

... volumes of heated and molten rock moving around the earth’s interior form massive solid plates that move extremely slowly across the earth’s surface.  Tectonic plates: huge rigid plates that are moved with convection cells or currents by floating on magma or molten rock. ...
Major Curriculum Area
Major Curriculum Area

... A mineral is a naturally-occurring, inorganic, solid substance with a definite chemical composition and structure. ...
2. Geologic History Agenda Physical Geographers Intro to Calif
2. Geologic History Agenda Physical Geographers Intro to Calif

... Changes in sedimentary or igneous rock due to heat or pressure  Radioactive decay  Pressure deep within Earth ...
Geology 101, Fall 2006  continental drift vs. plate tectonics
Geology 101, Fall 2006 continental drift vs. plate tectonics

... Draw one cross-section of the Earth that shows all of the following features: • a mid-ocean ridge • a trench • an accretionary wedge (mélange zone) • a volcanic arc • a forearc basin • a backarc basin ...
Answers - MrTubb
Answers - MrTubb

... 15. Earth's surface is constantly changing. Volcanoes erupt and form new crust. Lithospheric plate motions bend and crack old crust and cause earthquakes. Where do most of Earth's earthquakes and volcanoes occur? A. at the center of continental plates B. at the equator C. along hot spots in oceanic ...
Chapter 15
Chapter 15

... • The earth is made up of a core, mantle, and crust and is constantly changing as a result of processes taking place on and below its surface. • The earth’s interior consists of: – Core: innermost zone with solid inner core and molten outer core that is extremely hot. – Mantle: solid rock with a rig ...
Curriculum - Rivers2Lake
Curriculum - Rivers2Lake

... 5-ESS2-1. Develop a model using an example to describe ways the geosphere, biosphere, hydrosphere, and/or atmosphere interact. [Clarification Statement: Examples could include the influence of the ocean on ecosystems, landform shape, and climate; the influence of the atmosphere on landforms and ecos ...
Rock Cycle
Rock Cycle

... Metamorphic Rock Break Up ...
File
File

... a. Theories are explanations while laws are statements. A law is like a picture, it describes an event. A theory is like a caption to the picture, it explains what is going on. 3. Can a theory become a law? Why or why not? b. Theories are explanations, laws are statements. A theory is not a lesser ...
Minerals
Minerals

... Minerals are the building blocks for rocks. Most rocks are composed of more than one mineral. The minerals within a rock occur together as a mixture, so they keep their own properties and can be seen separately. ...
Changing Earth`s Surface
Changing Earth`s Surface

... Changing Earth’s Surface The most important agent of erosion is running water. Running water includes rivers, streams, creeks, melting ice and surface runoff after a rain. When water falls on a sloping landform, the water flows downhill, taking sediment with it. The particles carried by a stream ar ...
Plate Tectonic Theory Notes
Plate Tectonic Theory Notes

... 3. ___________________________________ combined what geologists knew about seafloor spreading, Earth’s plates, and continental drift into a single theory. 4. The theory of plate tectonics states that _____________________________________ ______________________________________________________________ ...
Non-Trad PA - Layers and Tectonics of Earth
Non-Trad PA - Layers and Tectonics of Earth

...  The students will have already learned about the layers of the earth, plate tectonics, and the causes and typical locations of major geologic events related to tectonic movement.  Students will be assessed on their knowledge of Earth’s internal structure and how different layers of the internal s ...
earth history unit 3
earth history unit 3

Plate Tectonics - St John Brebeuf
Plate Tectonics - St John Brebeuf

... Wegener realized that the puzzlelike fit of the continents were more than a coincidence, but he couldn't correctly explain what powered their movement. • Geologists now know that the Earth's outermost layer, the lithosphere, is divided into independently moving plates into which the continents are e ...
Earth`s Plates in Motion - Etiwanda E
Earth`s Plates in Motion - Etiwanda E

... • Rock formations, climate similarities, and plant & animal species gave further evidence. ...
The Rock Cycle - Science A 2 Z
The Rock Cycle - Science A 2 Z

... There are places on Earth that are so hot that rocks melt to form magma. Because magma is liquid and usually less dense than surrounding solid rock, it moves upward to cooler regions of the Earth. As the magma loses heat, it cools and crystallizes into an igneous rock. Magma can cool on the Earth's ...
Allan Cox - National Academy of Sciences
Allan Cox - National Academy of Sciences

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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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