火星介绍-英语ppt教学提纲.ppt

火星介绍-英语pptMars Mars is the fourth planet from the Sun in the Solar System.MarsMarsEquatorial radius：3397.2kmQuality：6.42191023 kgEquatorial radius：6372.8kmQuality：5.981024 kgMars diameter is only about half and its mass about one-tenth the Earths.Mars has polar ice caps and clouds in its atmosphere,seasonal weather patterns,volcanoes,canyons and other recognizable features.However,conditions on Mars vary wildly from what we know on our own planet.MarsVolcano on MarsSpring of MarsLife on Mars?Among our discoveries about Mars,one stands out above all others:the possible presence of liquid water on Mars,either in its ancient past or preserved in the subsurface today.Water is key because almost everywhere we find water on Earth,we find life.Pictures of channels probably carved by running water on Mars Life on Mars?Colour view of crater with water iceMars Exploration“Spirit”Mars probe（勇气号勇气号）Time of Launch:2003.6.10Time of Landing:2004.1.4“Opportunity”Mars probe（机遇号机遇号）Time of Launch:2003.7.7Time of Landing:2004.1.25NASA：美国宇航局：美国宇航局Mars Exploration“Curiosity”Mars probe（好奇号）（好奇号）Time of Launch:2011.11.26Planned Time of Landing:2012.8Protect the EarthTHANKSTHANKS此课件下载可自行编辑修改，仅供参考！此课件下载可自行编辑修改，仅供参考！感谢您的支持，我们努力做得更好！谢谢感谢您的支持，我们努力做得更好！谢谢