ppt课件模板:动态太阳系科普教育课件模板.pptx
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1、太阳系教育模板太阳系教育模板2 0 1 8 . 0 9 . 2 3认识太阳系认识太阳系我们将要学习:Solar System StarsGalaxyPlanetsAsteroidsCometsMeteorsSatellites太阳系的组成Nine Planets61 Known MoonsCometsAsteroids Meteoroids Interplanetary Gas and Dust4.6 BillionLarge theories suggest that the solar system began years ago as a spinning cloud of gas &
2、dust that condensedThe sun, a main source of light, is aboutFive Billionyears old. The suns surface, the photosphere has temperature of about 5,500 C. It is composedalmost entirely of Helium & Hydrogen.HHeHeHHHeThe sun mainly has four layers:The CoreThe PhotosphereThe Corona The Chromosphere.Solar e
3、clipseDuring the solar eclipse, moon moves in between the sun and the earth. The light from the outer part of the suns atmosphere, called the corona becomes visible during the total solar eclipse. In other words, the sun is hidden by the moon . starsStars are large celestial composed of gravitationa
4、lly contained hot gases emitting electromagnetic especially light as a result of nuclear reactions inside the star. SupernovaSome Stars are:Black HoleRed GiantgalaxyGalaxy are collection of stars, low density gases bound together by their own gravity. Galaxies are the building blocks of the universe
5、. The Andromeda GalaxyThe Milky Way Galaxy, in which the solar system is situated.You are hereThe SunplanetsA planet is a large round object in space that orbits around a star. There are nine planets in solar system. They are:mercuryMercury is the closest planet to the sun. It is a small, rocky plan
6、et. Its surface has been heavily cratered by meteorites. It completes one revolution around the sun in 88 days.venusVenus is called the morning and the evening star as it is the brightest object in the sky. Venus is the hottest planet of solar system.EarthThe fifth largest planet in the solar system
7、 is earth. Earth is the only planet which support to life. It is the third nearest planet to the sun.MarsMars is the known red planet because of red iron oxide dust that cover its surface. Mars includes the volcano Olympus Mons i.e. the biggest volcano in the solar system.jupiterJupiter is the large
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