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PDF format
PDF format

... Write your name out in full on the scantron form and fill in the corresponding ovals to spell out your name. Also fill in your student ID number in the space provided. Do not include the dash and do not leave any spaces. There are 55 questions (8 pages). For each question, select the correct answer ...
Plate Tectonics Review
Plate Tectonics Review

... 14. What force pushes magma to the surface at ocean ridges and ultimately drives the movement of tectonic plates? A) continental drift B) earthquakes C) volcanic eruptions caused by a hot spot D) convection currents in the magma 15. What is a tectonic plate? A) a large, flexible slab of rock B) a la ...
Earth, continental drift, plate tectonics, sea floor spreading
Earth, continental drift, plate tectonics, sea floor spreading

... parts are moving in opposite directions, carrying along the continents and oceans that rest on top of them. These pieces of Earth’s top layer are called tectonic plates. They are moving very slowly, but constantly. (Most plates are moving about as fast as your fingernails are growing -- not very fas ...
The Earth`s Layers Foldable
The Earth`s Layers Foldable

... 3. Now you may cut out the layers! Also cut out the four squares and the 12 labels. Remember to cut out The Earth's Layers title. 4. Set one piece of blue paper in front of you. Closely trim the title. Paste The Earth's Layers title in the top left corner of the paper. 5. Paste the Crust right below ...
Earth Science
Earth Science

... only when molten material hardens quickly under water ...
Earth`s Layers Review
Earth`s Layers Review

... Solid metal ...
Geol 101: Physical Geology Spring 2002
Geol 101: Physical Geology Spring 2002

... Write your name out in full on the scantron form and fill in the corresponding ovals to spell out your name. Also fill in your student ID number in the space provided. Do not include the dash and do not leave any spaces. There are 55 questions (8 pages). For each question, select the correct answer ...
Edible Tectonics
Edible Tectonics

... the temperature in that portion of the mantle to rise above its melting point. The small amount of melting mantle produced rises to the surface and erupts creating new crust, as well as earthquakes and volcanoes. ...
Chapter 7 Answers
Chapter 7 Answers

... something into a liquid or something that is not a solid, it slows down as it goes through and does not quickly come out the other end. 14. The lithosphere is the outer most layer of the Earth that is very rigid and is made up of 2 different parts. It is also were you find tectonic plates. In contra ...
Simple Impact Craters
Simple Impact Craters

... The Anorthosites that are common in the Lunar Highlands are not common on the surface of the Earth (The Adirondack Mountains and the Canadian Shield are exceptions). They form the ancient cores of continents on the Earth, but these have largely been obliterated by overlying sedimentary deposits and ...
Internal Structure of the Earth
Internal Structure of the Earth

... fairly low temperatures. I favor homogeneous accretion followed by separation, but inhomogenous accretion is certainly a possibility. • The present structure of core-mantle-crust seems to be due to melting/partial melting event involving – heat from coalescing the planet (mechanical energy from mete ...
Quiz 1 (Key)
Quiz 1 (Key)

... Multiple Choice: Answer each question with the one most appropriate answer (10 pts) 1. Reversals of the Earth’s magnetic poles: a) are not well understood; b) provide evidence, through paleomagnetism, for seafloor spreading; c) are recorded in the permanent magnetism of lavas millions of years old; ...
PDF file of Lecture 4a - Earth`s Interior and Tectonics
PDF file of Lecture 4a - Earth`s Interior and Tectonics

...  Liquid metal in outer core (heat from formation of inner core)  Air in atmosphere (heat from radiation hitting the surface) ...
Continental Drift and Plate Tectonics
Continental Drift and Plate Tectonics

... magnetized crystals at the time of mineral formation • Earth reverses its magnetic north at variable intervals ...
Inside Earth: Chapter 1
Inside Earth: Chapter 1

... ranges in Africa and South America indicate? • The presence of similar mountain ranges indicates that Africa and South America were once joined. ...
Unit 1 - Earth`s Dimensions Review Powerpoint
Unit 1 - Earth`s Dimensions Review Powerpoint

... A. Latitude lines are parallel and longitude lines meet at the poles B. Latitude lines are parallel and longitude lines meet at the equator C. Longitude lines are parallel and latitude lines meet at the equator D. Longitude lines are parallel and latitude lines meet at the poles ...
Grade 6 Vocabulary List
Grade 6 Vocabulary List

... usually occurs after a heavy rainfall The process by which hydrogen atoms join together to form helium, releasing energy A path of one body in its revolution about another body A meander cut off from a river The inner layer of the sun’s atmosphere A major body (not a comet or asteroid) orbiting arou ...
Earth Science EOG Review
Earth Science EOG Review

... Geologic (rock) Time Scale • Puts together all the information we get from rocks, ice cores and fossils. • Using major events, we can describe how life on earth has changed and relate those changes to geologic events. What major event ended the Precambrian time? Paleozoic era? Mesozoic era? Cenozo ...
6th Grade Earth Science Syllabus
6th Grade Earth Science Syllabus

... OVERVIEW: Earth processes that are observed today are similar to those that have occurred in the past. Focus Standards: S6E5. Students will investigate the scientific view of how the earth’s surface is formed. d. Describe processes that change rocks and the surface of the earth. f. Explain the effec ...
Earth Science Notes - watertown.k12.wi.us
Earth Science Notes - watertown.k12.wi.us

... • De solido intra solidum naturaliter contento dissertationis prodromus, 1669 • This principle states that layers of rock are originally deposited horizontally • If those original layers are no longer horizontal , some kind of caused them to change Distorted Rock Layers • Syncline • Anticline • Fold ...
If We Had No Moon
If We Had No Moon

... other planets in the solar system. Because of this obliquity change, the ice that is now at the poles on Mars would sometimes drift to the equator. But the Earth’s moon has helped stabilize our planet so that its axis of rotation stays in the same direction. For this reason, we had much less climati ...
Inside Earth: Chapter 1
Inside Earth: Chapter 1

... • The Island of Spitsbergen (Artic Ocean) has evidence of tropical plants • Deep scratches in rocks were found in South Africa • These scratches support evidence of ...
Earth`s Crust in Motion
Earth`s Crust in Motion

... 36. State Alfred Wegener’s hypothesis about how Earth’s continents have moved. Wegener’s hypothesis was that all the continents had once been joined together in a single landmass and have since drifted apart, to their current locations. 37. Wegener named his supercontinent Pangaea. ...
Energy in Ecosystems
Energy in Ecosystems

... 2. If the continents were at one time joined together as Pangaea, what might we expect to see around our coastlines that were at one point joined together? (Hint: pieces of evidence)______________________ __Similar shaped coastlines, landforms that line-up, similar fossils and minerals on different ...
DTU 8e Chap 6 Earth and Moon
DTU 8e Chap 6 Earth and Moon

... Earth’s atmosphere is about four-fifths nitrogen and one-fifth oxygen. This abundance of oxygen is due to the biological processes of life-forms on the planet. Earth’s atmosphere is divided into layers named the troposphere, stratosphere, mesosphere, and ionosphere. Ozone molecules in the stratosphe ...
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History of Earth



The history of Earth concerns the development of the planet Earth from its formation to the present day. Nearly all branches of natural science have contributed to the understanding of the main events of the Earth's past. The age of Earth is approximately one-third of the age of the universe. An immense amount of biological and geological change has occurred in that time span.Earth formed around 4.54 billion years ago by accretion from the solar nebula. Volcanic outgassing probably created the primordial atmosphere, but it contained almost no oxygen and would have been toxic to humans and most modern life. Much of the Earth was molten because of frequent collisions with other bodies which led to extreme volcanism. One very large collision is thought to have been responsible for tilting the Earth at an angle and forming the Moon. Over time, the planet cooled and formed a solid crust, allowing liquid water to exist on the surface.The first life forms appeared between 3.8 and 3.5 billion years ago. The earliest evidences for life on Earth are graphite found to be biogenic in 3.7-billion-year-old metasedimentary rocks discovered in Western Greenland and microbial mat fossils found in 3.48-billion-year-old sandstone discovered in Western Australia. Photosynthetic life appeared around 2 billion years ago, enriching the atmosphere with oxygen. Life remained mostly small and microscopic until about 580 million years ago, when complex multicellular life arose. During the Cambrian period it experienced a rapid diversification into most major phyla. More than 99 percent of all species, amounting to over five billion species, that ever lived on Earth are estimated to be extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described.Geological change has been constantly occurring on Earth since the time of its formation and biological change since the first appearance of life. Species continuously evolve, taking on new forms, splitting into daughter species, or going extinct in response to an ever-changing planet. The process of plate tectonics has played a major role in the shaping of Earth's oceans and continents, as well as the life they harbor. The biosphere, in turn, has had a significant effect on the atmosphere and other abiotic conditions on the planet, such as the formation of the ozone layer, the proliferation of oxygen, and the creation of soil.
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