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Seafloor spreading
Seafloor spreading

... recognition in science. Seismological investigations showed that the Earth merely has a thin solid crust that floats on a plastic mantle. Deep inside our planet there’s a very hot core. The Earth’s crust, which contains the continents and seafloor, is geologically divided into seven large and numero ...
Unit 1 Notes File
Unit 1 Notes File

... Heat generated from the collision of particles, decay of radioactive isotopes and residual heat in the Earth’s interior was responsible for melting the heavier elements (Ni and Fe). ...
The Earths Crust Quick Key
The Earths Crust Quick Key

... GCSE Chemistry Unit 1 The Earths Crust. ...
Earth Science Day 01: Layers of the Earth
Earth Science Day 01: Layers of the Earth

... A2: What is the distance traveled by a car in 5 hours (h) if its speed is 35km/h? A. 7 km If the car travels 35 km each hour for 5 hours, the total distance traveled would be 175 km (35 x 5) B. 150 km If the car travels 35 km each hour for 5 hours, the total distance traveled would be 175 km (35 x ...
The Layer`s Of The Earth!
The Layer`s Of The Earth!

... Surface Waves * Seismic waves that travel along the Earth’s outer layer. * They travel along the ground and cause the ground and anything resting upon it to move. *Surface waves are the most destructive earthquake waves. ...
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Lesson-2-WSs-for-Upl..

... 1. What is the main characteristic about Earth that has been learned by studying deep wells and deep mines? ...
Density of the Earth Lab procedures
Density of the Earth Lab procedures

... 3. Determine a scale for each axis by looking at the largest number from your data. (Take the largest mass and divide by the number of squares available on that axis…then round UP. This will be the scale for that axis. Do the same with the largest volume.). The scale must start at zero (the origin) ...
The Earth as a System - James Madison University
The Earth as a System - James Madison University

... Believe it or not, this is a subject of deep controversy within science with some arguing that these three are only accidently related to each other, and others arguing that they are deeply connected. I learn more toward the latter position than the former, but at this point in time the positions ea ...
Life on Venus - eoi1 Zaragoza
Life on Venus - eoi1 Zaragoza

... C The infra-red photos of Venus tell scientists what the planet’s surface might be made of because different rock types radiate different levels of heat and show up as different colours. The images revealed patches of lighter rock in highland areas, which on Earth are usually associated with contin ...
© UKRIGS Education Project: Earth Science On-Site
© UKRIGS Education Project: Earth Science On-Site

... Describe the lithosphere as the (relatively) cold rigid outer part of the earth that includes the crust and outer part of the mantle. ...
28.1 Understanding Earth
28.1 Understanding Earth

... The theory of plate tectonics, stated in 1965, refers to the movement of giant pieces of solid rock on Earth’s surface called tectonic plates. ...
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PANGEA

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Layers of the Earth - University of Dayton
Layers of the Earth - University of Dayton

...  At this point in time an ice age ended  The glaciers melted and oceans rose causing water to cover what was previously land ...
Earth`s Interior Reading Packet 1
Earth`s Interior Reading Packet 1

... ts Make a model of the earth and its layers. ...
Density of Earth Materials Lab - Mercer Island School District
Density of Earth Materials Lab - Mercer Island School District

... crust is composed of the rock basalt. Basalt is mafic (which means it has a high magnesium and iron content), composed of the minerals: calcium-rich plagioclase feldspar, olivine, amphibole, and pyroxene. Continental crust has more range in composition, but for our purposes we will assume that its a ...
Geography Notes
Geography Notes

... is Dec 21st and Summer is June 21st for the northern hemisphere) Equinoxes- two times during the year when the earth is as perpendicular to the suns rays as it will ever be. During this time, there is equal amounts of sunlight and darkness in both hemispheres. (Fall occurs approximately Sept 22nd an ...
Name - sfox4studentteacher
Name - sfox4studentteacher

... years, rivers have flowed over the land, weathering and eroding rocks to create a deep canyon. Fill in the following prompt to explain how weathering and erosion create canyons. Weathering and e_______________________ wear down and carry away r_____________ on Earth’s surface. Weathering is the b___ ...
Quiz Bowl Earth Terms
Quiz Bowl Earth Terms

... discharges gases and lava. Also a circular depression in a landscape caused by a meteorite impact. Crust – The outmost layer of solid Earth, consisting of continental and oceanic crust. Crystal – A solid, such as a mineral in a rock, whose atoms are arranged in a n orderly pattern. Current – A flow ...
Mid-Term Exam Study Guide
Mid-Term Exam Study Guide

... • Earthquakes are not randomly distributed around the earth. They occur most frequently along plate boundaries. Very large, deep earthquakes occur at convergent boundaries where ocean plates move beneath other plates, at regions called subduction zones. • There are several reasons for the perception ...
Glossary
Glossary

... The innermost part of the Earth and consisting of a solid central region and surrounded by a liquid zone. The predominant elements are iron and nickel. A circular depression usually found at the top of a volcanic vent from which erupts magma and gases. ...
The Earth
The Earth

... Mechanisms 1. Gravitational attraction of planetismals 2 x 107 g debris/y now, so 4 B years ago it was probably orders of magnitude higher) 2. Kinetic energy + mass + gravitational settling + sun’s temperature Earth largely molten and the consequences were: 1. Dense materials (Fe and Ni) sank to int ...
A Core Sample of Planet Earth I
A Core Sample of Planet Earth I

... each layer. Write words or phrases (not sentences). Include whether it is mostly rock or metal, the state of matter, and other important qualities (such as “rigid” for lithosphere and “weak, soft, flowing” for asthenosphere). 7. Use the ESRT to find the approximate temperatures for each end of the l ...
Chapter 3
Chapter 3

... – Sometimes these ions radiate the energy as light. ...
Unit - MNPSSocialStudies
Unit - MNPSSocialStudies

... Acquiring Information: read to gain literal meaning; use chapter and section headings, and topic sentences to select main ideas; detect cause and effect relationships; use picture clues and picture captions to aid comprehension; read from a variety of sources; use maps, graphs, globes, media and tec ...
CST Review - TeacherWeb
CST Review - TeacherWeb

... 4. Energy enters the Earth system primarily as solar radiation and eventually escapes as heat. 1. Identify the two main sources of energy in Earth’s system. (pg 35) 2. Where is the Earth’s geothermal energy most abundant (pg 559)? 3. Identify the possible fates of incoming solar radiation (pg 556) . ...
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Spherical Earth



The concept of a spherical Earth dates back to around the 6th century BC, when it was mentioned in ancient Greek philosophy, but remained a matter of philosophical speculation until the 3rd century BC, when Hellenistic astronomy established the spherical shape of the earth as a physical given. The paradigm was gradually adopted throughout the Old World during Late Antiquity and the Middle Ages. A practical demonstration of Earth's sphericity was achieved by Ferdinand Magellan and Juan Sebastián Elcano's expedition's circumnavigation (1519−1522).The concept of a spherical Earth displaced earlier beliefs in a flat Earth: In early Mesopotamian mythology, the world was portrayed as a flat disk floating in the ocean and surrounded by a spherical sky, and this forms the premise for early world maps like those of Anaximander and Hecataeus of Miletus. Other speculations on the shape of Earth include a seven-layered ziggurat or cosmic mountain, alluded to in the Avesta and ancient Persian writings (see seven climes).The realization that the figure of the Earth is more accurately described as an ellipsoid dates to the 18th century (Maupertuis).In the early 19th century, the flattening of the earth ellipsoid was determined to be of the order of 1/300 (Delambre, Everest). The modern value as determined by the US DoD World Geodetic System since the 1960s is close to 1/298.25.
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