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... 8. What is the difference between a silicate mineral and a nonsilicate mineral? Silicate minerals contain both silicon and oxygen as part of their chemical composition. Minerals that do not contain these two elements are called nonsilicates. 9. What is the most abundant mineral in Earth’s crust? Wha ...
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Geology II.

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presentation source

... • Positive when greater than normal, negative when less than normal. • Useful for: – Determining isostatic equilibrium – Minerals exploration (ie, dense metal ores) ...
Neptune!!!
Neptune!!!

... Celsius. It is made out of “ice” and rocks with about 15% hydrogen and a little helium. Neptune also has 13 known moon. They think that Neptune might have more then 13 moons though. The day rotation is 19 earth hours. The year rotation is 165 earth years. Witch is longer than us. ...
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EnvSci Chapter 3 Review Answers

... Tectonic Plate - _The large sections of lithosphere that float around on the mantle_ Earthquake - _Vibrations along faults as the plates slip past each other_ Volcano - _A mountain made from magma as it erupts through the surface of the Earth_ Mudflow - _When hot ash from a volcano mixes with water ...
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Spheres1 - BLAZN

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File - Earth Science Introduction

... 66 What kind of sedimentary rock can be cemented together by calcite or quartz? 67 What kind of sedimentary rock is made from dissolved minerals? 68 Besides texture, how else are rocks classified? 69 What kind of rock is formed from lava that cools on the Earth’s surface? 70 What kind of sedimentary ...
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... Earth’s history recorded in rock layers. The walls are made from sedimentary rock. • The oldest layers are 2 billion years old, which is almost ½ as old as the Earth. • The Earth is about 4.5 billion years old!!! ...
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Chapter 02 Earth Structure and Plate Tectonics

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... 2. Some of the best insect fossils are found in ________, or hardened tree sap. 3. A fossil that is found at a lower level in the ground is ______ than another fossil above it. 4. What type of fossils are made from animal tracks that become fossils when they fill with sediment and eventually turn to ...
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... heavy bombardment and by the heat production of the radioactive decay the young Earth was heated until it was mostly melted. As a result, there was a gravitational differentiation of the Earth into a core and mantle. The heaviest elements, especially iron, sank into the center of the planet, whereby ...
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4-11 and 4-12 Earth Review

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Study Guide and calendar for Geology Chapter One Spring 2012

... 4 Definition of latitude and longitude and how to locate on a map: 5 Topographic maps: symbols, contour lines 6 Layers of the earth and what caused Earth to develop layers as it cooled: 7 Know the name of the tectonic plate that the United States is part of and the adjoining plate by California. 8 D ...
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... Parts of the Earth (based on chemical properties) 1) Crust - a thin outer layer on average < 20km thick a) Continental Crust - ~35km thick (may exceed 60km); P waves travel at 6 kps;  = 2.67-2.8 g/cm3; granitic rocks b) Oceanic Crust - between 5-8 km thick; P waves travel at 7 kps;  = ~2.9 g/cm3; ...
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Physical Earth Science Semester 1 Mid

... 39. What is the color of the powdered form of a mineral called? streak 40. Differences in elevation are best shown using what kind of map? A topographic map 41. What is the current geologic period? Quaternary 42. Where is new ocean crust formed? At divergent boundaries 43. What happened to all the c ...
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heat energy inb ch 03

... 6. Research and write a report about the atmosphere and the unique properties of its layers. Remember that the layers are not categorized by rigid boundaries. 7. Create a storyboard or animation board that shows how convection currents move energy in the atmosphere or geospher. 8. Why is most life o ...
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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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