Only about 3% of the water on earth is fresh water, and about 70% of the fresh water is frozen in the form of glacial ice. Dec 16, 2011 the structure of the earth powerpoint. The crust is the layer that you live on, and it is the most widely studied and understood. Selection file type icon file name description size revision time user. For 27 days out of this cycle, the sun cannot shine on the whole of the surface, facing the earth. The structure of the earth powerpoint teaching resources. Early earth heats up due to radioactive decay, compression, and impacts. Origin and evolution of earth the national academies press. Robertson abstract evidence on the structure and composition of the earths interior comes from 1 observations of surface rocks, 2 geophysical data from earthquakes, flow of heat from the interior, the magnetic field, and gravity, 3 laboratory ex.
Over time the temperature of the planet interior rises towards the femelting line. The near mission the near earth asteroid rendezvous mission why is the earth near spherical. Ppt planet earth powerpoint presentation free to download. Origin of the universe the big bang theory an astonishing observation was made in the late 1920s. Szostak begins his lecture with examples of the extreme environments in which life exists on earth. Midocean ridge basalt, andesites, granites, sandstones, shales, limestones, metamorphic. Structure of the earthplate tectonics unit structure of the earthplate tectonics ppt. Earth day is the largest, most widely celebrated international environmental event.
The interior of the earth separates into a core and mantle. Earth developed continents and water perhaps even oceans and environments in which microbial life could emerge 4. Early and modern theories on the origin and the evolution of the earth. A free powerpoint ppt presentation displayed as a flash slide show on id. He postulates that given the large number of earth like planets orbiting sunlike stars, and the. Much of what we know about earths bulk composition was. The learner will be able to identify characteristics of the earths layers. Earth moon it takes the moon 28 days to orbit the earth. Ppt landforms of the earth powerpoint presentation free.
Nov 22, 2011 used this for my powerpoint presentation about denmark. The light from the sun can only shine on the whole surface for one night in each cycle. Landforms of the earth 3rd grade landforms based on. The lava surface outgassed carbon dioxide, sulfur dioxide, water and ammonia. Whitlock carrie whitlock, 2011 water features earth has a lot of water, in fact water makes up. It is very thin compared to the other three layers. Earth science is the study of earth and the universe around it. History of earth beginnings earth was believed to be formed about 4. Composition what it is made of crust mantle core the earth is divided into three layers based upon the material it contains.
Senator gaylord nelson founder of earth day the presidential medal of freedom the presidential medal of freedom is the highest honor given to civilians in the united statestwentyfive years ago this year, americans came together for the very first earth daythey came togetherbecause of one american gaylord nelson. It is not only the study of the earth as we see it today, but the history of the earth as it has evolved to its present condition. Four and a half billion years ago, the young earth was a hellish placea seething chaos of meteorite impacts, volcanoes belching noxious gases, and lightning flashing through a thin, torrid. Solid but capable of flow like hot asphalt or fudge thickest layer of the earth making up 70% of the earths mass the hot material magma in the mantle rises to the top of the mantle, cools, then sinks, reheats, and rises again. The crust of the earth is broken into many pieces called plates. This is a powerpoint based lesson introducing the main features of planet earth.
At the end of this lesson you will write a report about the layers of the earth using 4 facts you learned. This site was created to assist students who are studying the physical setting. The earth has evolved changed throughout its history, and will continue to evolve. The crust is truly an amazing and astonishing thing to learn and behold. Origin of the earths crust and its evolution huscap. Structure of the earth okaloosa county school district. Origin and evolution of earth national academies press.
It explains the moons lower density, lack of iron and oxygen isotope ratios that are identical to earths apollo. Deciphering the planets history and processes could improve the ability to predict catastrophes like earthquakes and volcanoes, to manage earths resources, and. Heres a set of poems and songs for earth day see more. Scribd is the worlds largest social reading and publishing site. Earth day song sung to twinkle, twinkle another catchy tune to get you motivated to celebrate earth day 2014 earth day song create own hand motionsdance for the song earth day tshirt hoodie. There is a plenary task at the end of the presentation. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. This collapse may have been triggered by a shockwave from a nearby supernova or star explosion.
Abiogenesis is also called spontaneous generation and it was disproven by experiments from. The origin of life on earth is a highly curious thing. It all began when an interstellar cloud nebula of gas and dust began to collapse. Geosphere the geosphere is the solid earth that includes the continental and ocean crust as well the various layers of earths interior. The earth and solar system were formed 4,560 million years ago. It covers the basic facts about the planet and explains the axis, equator, north and south poles and hemispheres.
The most important information about composition comes from looking around us. Free earth powerpoint template can be used in microsoft powerpoint 2010 and 20 and it contains a nice picture of clouds in the background and earth illustration showing america. Earths rotation and revolution earths rotation rotation is the spinning of the earth on its axis. The speed of rotation 24,855 miles24 hr or 1,038 mileshr earths revolution a revolution occurs as the earth moves around the sun. A version of the atlas with higher resolution maps file size 45mb is. The origin and the evolution of the earth authorstream. The outer core and inner core are even hotter with pressures so great you would be squeezed into a ball smaller than a marble if you were able to go to the center of. Origin and evolution of earth research questions for a changing planet questions about the origins and nature of earth have long preoccupied human thought and the scientific endeavor. During the collision that created the moon all of this atmosphere was lost. Although it is the most studied planet, it cannot be completely understood in isolation. The origin and the evolution of the earth authorstream presentation. The crust is a very small fraction of earth s mass, so it is not a very useful indicator of bulk composition.
Lighter materials, such as silicate minerals, migrate upwards in exchange. Earth day helps celebrate earths unique place in the universe. The presence of water on the young earth was confirmed when the zircons were analyzed for oxygen isotopes and the telltale signature of rocks that. Formation of the earth in human terms, the age of the earth is immense.
It is the only planet in our solar system teeming with incredible biodiversity and protecting this biodiversity is what earth day is all about. The origin of water on earth, or the reason that there is clearly more liquid water on the earth than on the other. The origin of universe scholastic the origin of universe earth and life science from the origin of life on earth to in universe theories about origin of earth chrome ias academy ppt age and origin of the earth powerpoint ation experiments call origin of earth s iron into ionthe origin of universe earth and life. Origin of the universe and the earth columbia university. A core to the gas cloud as well as a spinning disc of dust and gas are created because of the gravitational force within the lumps. This slide describes various theories about origin of the earth, like nebular theory, big. Jeans postulated certain axioms self proved facts as given below. The iron drops follow gravity and accumulate towards the core. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. In fact, many scientists have dedicated their entire lives to finding out how life came to be on earth. Scientists have everimproving tools to understand how earths internal processes shape the planets surface, how life can be sustained over billions of years, and. Earth day was founded in 1970 as a day of education about environmental issues, and earth day 20 occurs on wednesday, april 22the holidays 50th anniversary. Magnetic field plate tectonics hydrosphere biosphere earth facts age of the earth estimated age for the earth and the rest of the solar system is about 4.
Gradually, an irregularly shaped proto earth develops. Origin of earth scientific and engineering theories and. Alternatively you can download another free design powerpoint template. Inner core outer core mantle crust the crust the earths crust is like the skin of an apple. The following are regarded as the stages in the planets development. The chemistry of meteorites and sun provide constraints on the composition of the bulk of the earth. Mea surements of the ratio of the hydrogen isotopes deuteriumandprotiumpointtoasteroids,sincesim ilarpercentageimpuritiesincarbonrichchondrites were found in oceanic water, whereas previous measurement of the isotopes concentrations in comets and transneptunian objects correspond onlyslightlytowaterontheearth. The most important information about composition comes from looking around us in the solar system. The lava surface continued outgassing restoring the atmosphere. The early earths atmosphere the earth may have started with a hydrogen atmosphere which it could not hold on to for long.
The crust is a very small fraction of earths mass, so it is not a very useful indicator of bulk composition. The solar system is composed of a set of radically different types of planets and moons from the gas giants jupiter, saturn, uranus, and neptune to the rocky inner planets. Geology 111 discovering planet earth a1 early history of the earth the earth and the rest of the solar system were formed about 4. The magnetic field of the earth introduction studies of the geomagnetic.
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