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drifting continents - PNU
drifting continents - PNU

... (continere, Latin for “to hold together”), a derivation that implies a structural unity, though not necessarily dry land.  A large mass, as a distinct from an ...
The Dynamic Earth Ch. 3 Sect. 1 Objectives Describe the
The Dynamic Earth Ch. 3 Sect. 1 Objectives Describe the

... 2.Earth’s surface radiates heat back to the atmosphere Some heat escapes Some heat is trapped by Greenhouse Gases Ex: water vapor, carbon dioxide, methane, nitrous oxide 3.Trapped heat radiated back to Earth’s surface, warming the air. Without this Earth would be too cold to live on However, too man ...
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 ...
ES CH 3 Test Review
ES CH 3 Test Review

... nonliving parts of the environment with which they interact. 21. The atmosphere consists of the layers of gases surrounding our planet. 22. The hydrosphere encompasses all water—salt, fresh, liquid, ice, and vapor—on Earth’s surface, underground, and in the atmosphere. 23. Earth’s crust is a thin la ...
The Dynamic Earth
The Dynamic Earth

... Rocks in the mantle that allow continents to move ...
Structure of the Earth powerpoint
Structure of the Earth powerpoint

... • Earth was formed roughly 4.6 billion ears ago and for a long time was entirely molten. • The various materials (elements) that make up the earth were stratified (separated) according to their density. • The densest elements formed the core and the lighter elements floated to the surface. ...
Unit 2 Study Notes
Unit 2 Study Notes

... conduction. 14. Scientists think that the outer core, made of liquid iron and nickel, moves to produce Earth’s magnetic field. 15. The energy from the sun that warms your face is transferred by a process called radiation. 16. A series of processes known as the rock cycle slowly changes rocks from on ...
Chapter 21, Lesson 2
Chapter 21, Lesson 2

... • Will support life • Solid inner core • Mixture of CO2 surrounded and water by liquid vapor provide outer core enough greenhouse effect to keep surface temperatures warm enough ...
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Chapter Notes

... the volume of the clean, dry air. ...
Chapter 3
Chapter 3

...  Coldest layer  As low as -93 degrees C. ...
The Earth*s Physical Geography
The Earth*s Physical Geography

... Core – The sphere of very hot metal at the center of the Earth. Mantle – The thick layer around the Earth’s core Crust – The thin, rocky layer of Earth’s surface Magma – soft, nearly molten rock Plate – a huge block of Earth’s crust Weathering – A process that breaks rocks down into small pieces Er ...
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Earth

... New mountains can be formed when land masses are being pushed together due to plate tectonics, and also from volcanic activity. Mount Everest and the rest of the Himalayas make up a ...
Early Earth and the Origin of Life
Early Earth and the Origin of Life

... That the geographical distribution of organisms has changed over time  Reason? – The land formations of the earth have changed through continental drift ...
“Physical Geography: A Living Planet”
“Physical Geography: A Living Planet”

... c. the layer of gasses that surround the earth? _________________________________ d. the plants and animals that live on earth? ___________________________________ 3. Describe the process of continental drift. ...
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... ________________1. A great depression occupied by the ocean on the surface of the lithosphere. ________________ 2. a rigid layer of the Earth's crust that is believed to drift slowly. ________________ 3. The movement, formation, or re-formation of continents described by the theory of plate tectonic ...
Section 8-4
Section 8-4

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Our dynamic earth
Our dynamic earth

... ,the next layer is the outer core, then the mantle and finally the crust of which has two types ; the oceanic crust and the continental crust. • Both types of crust is 60 miles deep. • The inner core can reach to the level of heat , 5000 degrees twice as hot as the sun. ...
Jeopardy (#2) - Heritage Collegiate
Jeopardy (#2) - Heritage Collegiate

... Age of Ancient life ...
Quiz # 8
Quiz # 8

... B) Because CO2, which traps heat from the planet's surface, is the major component in the very dense Venusian atmosphere while it is a only a minor constituent of the Earth's. C) Because the oceans upon Earth have acted as a thermostat in absorbing much of the heat that would otherwise have raised t ...
the junior version pdf file
the junior version pdf file

... The crust, is the outermost layer and consists of a coating of a modest thickness that covers the Earth. Its surface is partly covered by the waters of the seas and of the oceans and in part it forms the five continents. Its structure is varied, and characterized by plains, mountain ranges, faults ( ...
Constructive and Destructive Forces on Earth vocb
Constructive and Destructive Forces on Earth vocb

... 1. Uniformitarianism- the theory that changes in the earth's crust during geological history have resulted from the action of continuous and uniform processes (Erosion and Deposition) 2. Earth Processes dynamic actions that occur on and below the Earth's surface 3. Geology the study of the Earth and ...
Components of Earth
Components of Earth

... – natural process that keeps the environment at temperatures in which life can exist ...
6th Grade Vocabulary 6, test on Wednesday, 1/11/17
6th Grade Vocabulary 6, test on Wednesday, 1/11/17

... inner core - the solid metal innermost part of the earth lith- or litho- - prefix meaning "rock" or "stone" lithosphere - the rigid outermost layer of the earth that includes the rocky plates both above and below the ocean mantle - the thick middle layer of the earth magnetosphere - the earth's magn ...
WELCOME BACK! - Year 6 and 7 Mathematics, Science and
WELCOME BACK! - Year 6 and 7 Mathematics, Science and

...  Continental Drift Theory-Quick Review  Plate Tectonics ...
Document
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... 11. The outermost layer of the Earth is called the __________________________. 12. The ___________________________ is solid nickel and iron; under extreme heat and pressure. 13. The __________________________ is melted nickel and iron. 14. A _____________________________ is when plates are moving ap ...
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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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