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Extreme Earth - Introduction
Extreme Earth - Introduction

... snow and cool summers. Glaciers develop. ...
Chapter 4 – Plate Tectonics
Chapter 4 – Plate Tectonics

... Theory of Plate Tectonics o It is believed that fossils of the same land-living reptiles have been found in Antarctica, India and South Africa because these areas were once connected to each other. o Plate movement measured in centimeters per year ...
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Name__________________________________ pd________ Use the links to help you answer the questions.

... 13. Elements are substances that cannot be broken down into simpler substances by ordinary chemical means. There are 92 naturally-occurring elements in the Universe. Ten elements make up nearly all (99.795%) of Earth’s crust. The list of those elements is at this website: http://education.jlab.org/g ...
Geology - s3.amazonaws.com
Geology - s3.amazonaws.com

... – geo means “land, earth” – ology means “study of” ...
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... 3. Why do less dense compounds make up Earth’s crust while the densest compounds make up the core? _______________________________________________________________ _______________________________________________________________ 4. List the three layers of the Earth, based on their chemical compositio ...
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... 3. Why do less dense compounds make up Earth’s crust while the densest compounds make up the core? _______________________________________________________________ _______________________________________________________________ 4. List the three layers of the Earth, based on their chemical compositio ...
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SCI Ch4 Study Guide KEY

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Plate Movements and Continental Growth

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Ocean waves that wear away an island`s shoreline

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Inside the Earth
Inside the Earth

... Did someone say tectonic plates? Read page 92 • What are they? • How many major plates are there? • What do they do? • What are they like? • How are they shaped? ...
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Chapter One: Plate Tectonics

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... loop that involves the processes by which one rock changes to another  Illustrates the various processes and paths as Earth materials change both on the surface and inside the Earth ...
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EARTH SCIENCE REVIEW

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... High silica magma found in more explosive volcanoes due to build up of pressure with ...
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Extreme Earth - Introduction
Extreme Earth - Introduction

... Approx. 40% of material from before the midterm test. Approx. 50% of material from after the midterm test. ...
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Chapter_1_Section1

... Rock – the material that forms Earth’s hard surface Geologists study: the processes that create Earth’s features search for clues about Earth’s history study the chemical and physical properties of rock map where different types of rock are found ...
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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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