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Chapter 10
Chapter 10

... is zero in a liquid. (This point will become important later). Note that S-waves travel slower than P-waves, so they will reach a seismograph after the P-wave. ...
Final Examination Key
Final Examination Key

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What are the characteristics of a mineral?
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... • S6E3 Students will recognize the significant role of water in earth processes • a. Explain that a large portion of the Earth’s surface is water, consisting of oceans, rivers, lakes, underground water, and ice. • b. Relate various atmospheric conditions to stages of the water cycle. • c. Describe t ...
Study Guide - ab032.k12.sd.us
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... Lesson One Geologists-scientists who study Earth Crust-Solid, outer surface of Earth Original Horizontality-rocks forming in flat, horizontal layers Pangaea-The huge super continent that was believed to exist before the continents separated Continental Drift-Hypothesis that the continents were one l ...
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earthquakes - Archway Chandler

... past each other. (have students press hands together firmly while also sliding them, when they suddenly slip and move, that is similar to what happens in the earth) a. Focus – the place within the Earth’s crust where the pressure was released in an earthquake. b. Epicenter – the point on the Earth’s ...
Chapter 14 PPT Lecture Notes with Blanks
Chapter 14 PPT Lecture Notes with Blanks

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Unit VI: Solid Earth Circulation
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“I CAN” STATEMENT TEMPLATE FOR POWER STANDARDS

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... Plate tectonics is the theory that the Earth's crust is broken  into huge plates that shift and move on the molten layers  below the crust. Where two plates come together = fault zones Along these zones mountains, volcanoes, and earthquakes  occur. ...
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Climate Zones - Lourdes Academy
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... properties of a solid but it can also flow 2900 km A core – made of molten nickel and iron. Outer part (2000km) is liquid and inner part (1300km) is solid How do we know this? These facts have all been discovered by examining seismic waves (earthquakes) ...
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... Glassy Igneous Rocks Glassy Igneous Rocks cool so rapidly, that atoms don’t have enough time to get together, bond and form crystals. To cool this quickly the rocks MUST be extrusive. • Pumice (left) • Scoria (bottom left) • Obsidian (bottom right) • Note gasses in the lava can cause fine holes cal ...
NAME: . Plate Tectonics and Earthquake Scavenger Hunt 1st SITE
NAME: . Plate Tectonics and Earthquake Scavenger Hunt 1st SITE

... 2. The plates that make up the crust fit together like pieces of a _______________. 3. Which plate do we live on? ___________ _____________ (Hint: Earth Map) 4. We live on the earth’s outermost layer. What is it called? ________________ 5. Match each description using a C for continental plates or O ...
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Low-Density Anomalies in the Mantle
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... In the beginning of the 1970s, Morgan [1] introduced the concept of the mantle plume into the everyday terminology of geological research. In succeeding years, different aspects of this hypothesis were considered: the heat source and mechanisms of plume ascent [2–4]; isotope-geochemical features [3, ...
Plate Tectonics Test
Plate Tectonics Test

... Plate Tectonics Study Guide What is the distance from the earth's surface to the center of the earth? 6,400 km What do Paleontologists study? They study fossil evidence to learn more about Earth’s history Based on scientific evidence, what is the approximate age of the earth? 4.5 billion years old P ...
Suggestions for obtaining UC "d" lab status - H
Suggestions for obtaining UC "d" lab status - H

... courses employ college textbooks and have demonstrated a high level of rigor. The Honors Geology course overcame a second hurdle, it is considered an Honors course by the UC system, giving my students the extra grade point average “bump” that accompanies honors and AP courses. Unfortunately, many sc ...
Plate Tectonics Review
Plate Tectonics Review

... The Inner Core is made mostly of these two elements? ...
Topic/Objective: ______ _____ Full Name: __________ Class: __
Topic/Objective: ______ _____ Full Name: __________ Class: __

...  The study of the propagation of ______________ energy that is released by ________________ and explosions through the Earth is known as ___________________.  _________________ waves are started because of initial ____________ or compression in the rock. Otherwise known as ____________. These wave ...
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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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