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version 1
version 1

... Plates ride on top of convective cells. Lava flows through cell boundaries. Earth loses internal heat this way. ...
Lecture PowerPoint Slides
Lecture PowerPoint Slides

... amounts of molten rock • Molten rock results in lower overall density • Amount of molten rock must be very small because S-waves are able to pass through the LVZ • Depth = approximately 100 km to 660 km ...
Earth`s Processes Test Review
Earth`s Processes Test Review

... 6. Fill in the blank with the words epicenter and focus. The ___________________ is the point on the Earth’s surface directly above the ___________ (which is where an earthquake originates). 7. A seismograph measures and records ground movements during an _____________________________. ...
File - Physical Science
File - Physical Science

... B) basalt spout C) melt well D) hot spot 4. It is thought that submarine canyons on the continental slope have been generated by ____. A) streams when sea level was much lower than it is today C) a submarine glaciations B) streams when sea level was much higher than it is today D) turbidity currents ...
History of Climate Change
History of Climate Change

... History of Climate Change  During earth’s history, climate has generally been warmer than it is today, but is periodically interrupted by short cooler periods.  Our climate today exists in one of those cooler periods. (last 2 million years) ...
Slide 1
Slide 1

... • Hotter mantle rises toward the surface of the earth • Cool mantle moves toward the center ...
Earth`s Interior Convection and the MantleSection 2 Summary
Earth`s Interior Convection and the MantleSection 2 Summary

... ago. People wonder, "What's inside Earth?" The extreme conditions in Earth's interior prevent exploration far below the surface. Geologists have used two main types of evidence to learn about Earth's interior: direct evidence from rock samples and indirect evidence from seismic waves. Rocks from ins ...
Unit 1 Goal 1: Unique Planet
Unit 1 Goal 1: Unique Planet

... (gravity) between two objects depends on their masses and the distance between them. The more massive they are and the closer they are together, the greater the attraction. Mass is the amount of matter that makes up an object. Weight is the effect of gravity on that mass. The father you are from the ...
Homework01h - Kean University
Homework01h - Kean University

... 2. Many scientists believe a large meteorite struck the Earth at the end of the Cretaceous, raising a dust cloud that blotted out the sun and killed many plants that large animals needed for food. True or False? 3. During the Earth's first 10 to 20 million years, the planets internal temperature ros ...
Layers of the Earth Poster Project Instructions and
Layers of the Earth Poster Project Instructions and

...  Characteristics: Look at the PPT notes given in class or look on our class website These are some things you should include, but are not everything. You should write at least three or four sentences. a. Thickness – How thick is the layer? (use Kilometers) b. Material – What is its primary mineral ...
A new Norwegian Centre of Excellence at the Department of
A new Norwegian Centre of Excellence at the Department of

Theory of Continental Drift
Theory of Continental Drift

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... • Write the page number where you can find information to help you answer the question ...
ES SOL Review pg 1
ES SOL Review pg 1

...  Theory that the Earth’s crust and upper mantle are divided into sections (plates) that move over the lower mantle. Lithosphere: solid outer shell of Earth consisting of the crust and upper mantle. Asthenosphere: the plastic-like lower mantle which plates move over. ...
Layers of the Earth, Continental Drift, and Plate Tectonic Overview
Layers of the Earth, Continental Drift, and Plate Tectonic Overview

... 13. If the Earth's crust is growing at mid-ocean ridges, why doesn't the Earth itself grow larger? 14. What was Pangaea? 15. Where would you expect to see the following features? a. tall, wrinkled mountains in the middle of a continent b. a long parallel ridge on the ocean floor surrounded by parall ...
SOL Review 1
SOL Review 1

...  Theory that the Earth’s crust and upper mantle are divided into sections (plates) that move over the lower mantle. Lithosphere: solid outer shell of Earth consisting of the crust and upper mantle. Asthenosphere: the plastic-like lower mantle which plates move over. ...
Check for Understanding
Check for Understanding

... and trace amounts of lighter elements; Slightly cooler than inner core. • Mantle- extends to a depth of 2,890 km, making it the thickest layer of Earth; is composed of rock that is rich in iron and magnesium. • Crust- The crust ranges from 5–70 km (3–44 miles) in depth and is the outermost layer; Ma ...
The Earth - Indiana University Astronomy
The Earth - Indiana University Astronomy

...  Differentiation occurs in a mixture of heavy and light materials if these materials are liquid for a long enough time  The Earth must have been almost entirely liquid in the past ...
Earth Science MCAS Review
Earth Science MCAS Review

... toward the Sun (direct rays), it is summer. When Northern Hemisphere is angled away from the sun (indirect rays), it is ...
Chapter 4
Chapter 4

...  Alfred Wegener  Continents can drift apart from one another and have done so in the past Pangea  Greek word meaning “All Earth”  Name for the single land mass that is the separate continents of today Panthelassa  Name for the single ocean of the world that is the separate oceans of the world t ...
Powerpoint presentation for Lecture 3 - e
Powerpoint presentation for Lecture 3 - e

... in Tropics ...
Earth`s Magnetic Field, Atmosphere and Geology
Earth`s Magnetic Field, Atmosphere and Geology

... – It’s radiation: extremely hot, high-energy, fastmoving charged particles (ions) given off by the sun. Most of these particles are protons. – If you were exposed to it for just a few hours without protection, your skin and every organ in your body would be burned, and you’d have a fatal dose of rad ...
APES_Chapter_16_Part_1_Geology_Guided_Power_Point_Notes
APES_Chapter_16_Part_1_Geology_Guided_Power_Point_Notes

... formed __________landmass (called Pangaea) about 200 million years ago and that the landmass broke apart into smaller continents over time. 3. Sea Floor Spreading occurs along an ocean basin where magma deep in the earth creates new ground – new _______ is made. (The sea floor is spreading under the ...
Chapter 19
Chapter 19

... Happen oEarthquakes occur when rocks under stress suddenly shift along a fault. oVibration of Earth caused by the release of energy by the movement of the fault or plate. oAssociated with movements along faults and plate boundaries ...
Astronomy 211 EXAM 3 2012 April 20 Except for questions 22 and
Astronomy 211 EXAM 3 2012 April 20 Except for questions 22 and

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Geophysics



Geophysics /dʒiːoʊfɪzɪks/ is a subject of natural science concerned with the physical processes and physical properties of the Earth and its surrounding space environment, and the use of quantitative methods for their analysis. The term geophysics sometimes refers only to the geological applications: Earth's shape; its gravitational and magnetic fields; its internal structure and composition; its dynamics and their surface expression in plate tectonics, the generation of magmas, volcanism and rock formation. However, modern geophysics organizations use a broader definition that includes the water cycle including snow and ice; fluid dynamics of the oceans and the atmosphere; electricity and magnetism in the ionosphere and magnetosphere and solar-terrestrial relations; and analogous problems associated with the Moon and other planets.Although geophysics was only recognized as a separate discipline in the 19th century, its origins go back to ancient times. The first magnetic compasses were made from lodestones, while more modern magnetic compasses played an important role in the history of navigation. The first seismic instrument was built in 132 BC. Isaac Newton applied his theory of mechanics to the tides and the precession of the equinox; and instruments were developed to measure the Earth's shape, density and gravity field, as well as the components of the water cycle. In the 20th century, geophysical methods were developed for remote exploration of the solid Earth and the ocean, and geophysics played an essential role in the development of the theory of plate tectonics.Geophysics is applied to societal needs, such as mineral resources, mitigation of natural hazards and environmental protection. Geophysical survey data are used to analyze potential petroleum reservoirs and mineral deposits, locate groundwater, find archaeological relics, determine the thickness of glaciers and soils, and assess sites for environmental remediation.
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