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hsess1-5
hsess1-5

... Examples include evidence of the ages oceanic crust increasing with distance from mid-ocean ridges (a result of plate spreading) and the ages of North American continental crust increasing with distance away from a central ancient core (a result of past plate interactions).] ...
Plate Tectonics
Plate Tectonics

... causes Earth’s crust to move over time resulting in many of the landforms and geographic events that occur on Earth. ...
Plate Tectonics - Awtrey Middle School
Plate Tectonics - Awtrey Middle School

... 20 min video clip to get us started! ...
99 Things to Remember for the Regents Exam
99 Things to Remember for the Regents Exam

... Memorize the "Dreaded 13 Must-know Earth Science Facts " ...
Layers of the Earth
Layers of the Earth

... Earth, the largest rocky planet, was formed about 4.5 billion years ago.  The Earth's interior is divided into four different layers.  It is cool on the surface but very hot deep inside the planet.  The center, or core, is as hot as 9000 degrees F which is hotter than the surface of the sun. ...
Chapter 2 Physical Geography: A Living Planet
Chapter 2 Physical Geography: A Living Planet

... action of wind, water, ice and gravity ...
Global Climate - Cloudfront.net
Global Climate - Cloudfront.net

... • 2. Name one place where a cold water current is found • 3. Name one place where a subduction zone can be found • 4. Name one place where two land plates come together to form a mountain range • 5. Put the following events in order: Mammals, amphibians, fish, ozone forms, oxygen levels rise, photos ...
Study Guide Chapt 7: Solid Earth
Study Guide Chapt 7: Solid Earth

... does this affect life? (more harmful high energy solar particles confused pigeons??) Paleomagnetism is the study of Earth’s past magnetic field Plaeomagnetic dating is a useful method used for dating rocks based on their magnetic polarity. Plate tectonics Wegner 1912 first introduced the idea of con ...
Study Guide Chapt 7
Study Guide Chapt 7

... does this affect life? (more harmful high energy solar particles confused pigeons??) Paleomagnetism is the study of Earth’s past magnetic field Plaeomagnetic dating is a useful method used for dating rocks based on their magnetic polarity. Plate tectonics Wegner 1912 first introduced the idea of con ...
Earth PowerPoint
Earth PowerPoint

... Mantle is much less dense than core Mantle is rocky; core is metallic—iron and nickel ...
Unit1continetaldrift 3.40MB 2017-03-29 12:41:28
Unit1continetaldrift 3.40MB 2017-03-29 12:41:28

... Wegener’s studies eventually led to the formulation of the PLATE TECTONIC theory. This states that the Earth’s crust is not a continuous skin but a series of rigid, spherical caps about 100km thick. Of these seven are very large and five carry continents. See diagram A on the next sheet. The plates ...
Inside the Earth - Londonderry NH School District
Inside the Earth - Londonderry NH School District

... •Solid ball due to high pressure (most dense layer) •1540 miles across •3700°C = VERY HOT! •Iron and nickel •Intense pressure keeps it from liquefying ...
Earth`s Internal Structure
Earth`s Internal Structure

... The outermost layers of the Earth are the atmosphere, hydrosphere and biosphere. The atmosphere is composed of 78% nitrogen, 21% oxygen and minor amounts of other gases such as carbon dioxide and water vapour. The earliest atmosphere was much different; it was essentially oxygen free and consisted l ...
Earth`s Different Layers
Earth`s Different Layers

... • What happened to the materials when you stirred them? • How do you think this model represents the layers of Earth? ...
Earth Science
Earth Science

... Earth Science • The multidisciplinary Earth sciences are generally classified according to one of four general spheres, or domains, of Earth: – lithosphere: the outermost layer of rocky land. – hydrosphere: the combined water (solid, liquid, and gas) found on and under the surface. – atmosphere: th ...
The Living Planet PPT
The Living Planet PPT

... – Hold more than 95% of earth’s fresh water supply – Salt water lakes  Rivers and streams – Flow through channels and move water to or from larger bodies of water – Drainage basin: are drained by major ...
Geological History
Geological History

... • Isostasy- The crust floats on the mantle since the crust is less dense. • The heavier the crust, the more it will push on the mantle • Mantle is not “liquid” like we think of it…it has plasticity. ...
Chapter 3 - Section 1 - Guided Notes - Day 1
Chapter 3 - Section 1 - Guided Notes - Day 1

... interact with each other. ...
Plate Tectonics Key Concepts List
Plate Tectonics Key Concepts List

...  Includes all of the crust and upper part of the mantle…………………….lithosphere\  A measure of how much mass there is in a volume of a substance…………..density  This forms along a divergent boundary on land……………………………rift-valley  Supercontinent that began to break apart about 225 million years ago…….. ...
LAB 2
LAB 2

...  Earth’s Surface  Cool & Rocky  Very Thin  The rigid, rocky outer surface of the Earth, composed mostly of basalt and granite. The crust is thinner under the oceans. ...
Interior Earth vocabulary.xlsx
Interior Earth vocabulary.xlsx

... push together. The transferalong of energy from place bycontinental the motioncrust of heated gas or liquid; in Earth's mantle, convection is thought to transfer energy by the motion of solid rock, which when under great heat and pressure can move like a liquid. A circulation pattern in which materi ...
practice MSP questions MSP Science Review Questions
practice MSP questions MSP Science Review Questions

... 7. To show the flow of energy 8. Offspring receive genetic information from both parents 9. The population can adapt to changes in the environment 10. Three 11. It will go down because the mass of the gas is lost to the air. 12. They move faster 13. Answers will vary (Check with teacher if you are u ...
Earth`s Structure and Tectonics Overview 2014
Earth`s Structure and Tectonics Overview 2014

... does not result in the Earth’s crustal surface area to increase: ______________________________ ________________________________________________________________________________ ________________________________________________________________________________ 11. When two continental crusts collide, t ...
Plate Tectonic Vocabulary
Plate Tectonic Vocabulary

... Theory of continental drift: A theory that states that the continents were a single landmass at one time in the past and have moved over time to their present positions. The theory of continental drift was first suggested by Alfred Wegener. Theory of plate tectonics: The theory that Earth’s lithosph ...
File
File

... • Geologic Time and the History of Life – Complex life forms became abundant ~544 million years ago – Reptiles became abundant ~230 million years ago – Dinosaurs became extinct (along with many other organisms) ~65 million years ago – Humans have been around for only ~ 3 million years ...
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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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