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1、 恐龙的起源恐龙的起源陈婕陈婕 Dinosaur is about ten million years ago,earth reptiles.There are many kinds of them,the body size,shape,living habit each are not identical,land,sea and air were dinosaurs reptiles activities.Big as Chinas sichuan province found hechuan horse hechuan county,the dragon gate 22 meters
2、long,body weight,high 3.5 meters 40 50 tons.Usually in the depth of 5 10 meters of lakes in the life,using the buoyancy of water body,with the top heavy water algae for food.Little parrot dragon whole body only a puppy.Some can fly through the air,like the long tail beaks dragon,sharp teeth and a lo
3、ng tail.Tail end a fly swatler shapes of membrane,as the tool tip is flying.Plenty of the overlord,such as fish,meat good Himalayan swim,jaw long,long kiss,mouth has formed teeth,looks like the dolphins today.Plenty of onshore warrior,such as stegosaurus,height 6 meters high,small head,back,has two
4、triangular plates,tail pointed up at the foot,is a bone spur weapons.To 1 million years ago,due to strong crust movement caused by the terrain,climate change,seek hegemony a dinosaur in the earth was completely destroyed.Dinosaurs were the cause of destruction,but should see no reason is various and
5、 complicated,is the external environment and inner factors interact dinosaurs The origin of Dinosaurs 恐龙是距今1亿3千万年前地球上爬行动物的总称。它们的种类很多，身体大小、形状、生活习性各不相同，陆地、海洋、空中都是恐龙类爬行动物的活动场所。大的如中国四川省合川县发现的合川马门溪龙，全身长22米，体高3.5米，体重4050吨。平时在水深510米的湖泊中生活，利用水的浮力浮起笨重的身体，以水中的藻类为食物。小的鹦鹉龙整个身体只有一只小狗大。有的能在空中飞翔，像长尾的喙嘴龙，有尖利的牙齿和长长的
6、尾巴。尾巴末端有一块像苍蝇拍形状的膜，飞翔的工具是翼膜。有的是海中的霸王，如喜马拉雅鱼龙，食肉善游，上下颌特别长，形成长吻，口内有牙齿，外貌很像今天的海豚。有的是陆上的武士，如剑龙，身长6米，头小，背部高拱，有两排三角形的骨板竖立着，尾尖处有骨刺，是御敌的武器。到了1亿3千万年前左右，由于强烈的地壳运动所引起的地形、气候的变化，称霸一时的恐龙在地球上就完全灭绝了。恐龙灭亡的原因至今没有定论，但应看到原因是多方面的、复杂的，是当时外界环境的改变与恐龙内在因素相互作用影响的结果 The dinosaur species Tyrannosaurus rex,also known as,type sp
7、ecies and currently the only valid species is Tyrannosaurus rex(Tyrannosaurus rex),also known as Rex Long,is a large,carnivorous dinosaurs Tyrannosaurus rex,the body length of about 13 meters,weighs about seven tonnes,survival in the late Cretaceous of Maastricht order last 300 years,dating back abo
8、ut 6850 years to 6550 years,is the Cretaceous-Tertiary extinction event,one of its last dinosaur species.Fossils found in North America,the United States and Western Canada,the distribution of a wider range of subjects than the other Raptors.霸王龙又名暴龙，模式种与目前唯一的有效种是雷克斯暴龙（Tyrannosaurus rex），或称雷克斯龙，是一种大型
9、的肉食霸王龙性恐龙，身长约13米，体重约7公吨，生存于白垩纪末期的马斯垂克阶最后300万年，距今约6850万年到6550万年，是白垩纪-第三纪灭绝事件前最后的恐龙种群之一。化石分布于北美洲的美国与加拿大西部，分布范围较其他暴龙科更广。Stegosaurus was a huge dinosaur that lived in the late Jurassic four-legged herbivores.They are considered to be living in the plains,and to groups of nomadic ways and other herbivore
10、s,such as the dragon beams with life.Its back has a row of large bony plates,and the danger with four tail spikes defense against predators.Approximately up to 12 meters long and 7 meters high,can weigh 4 tons.剑龙为一种巨大的恐龙，生存于侏罗纪晚期四只脚的食草动物。它剑龙为一种巨大的恐龙，生存于侏罗纪晚期四只脚的食草动物。它们被认为是居住在平原上，并且以群体游牧的方式和其它如粱龙的们被认
11、为是居住在平原上，并且以群体游牧的方式和其它如粱龙的食草动物一同生活。它的背上有一排巨大的骨质板，以及带有四根食草动物一同生活。它的背上有一排巨大的骨质板，以及带有四根尖刺的危险尾巴来防御掠食者的攻击。大约可达尖刺的危险尾巴来防御掠食者的攻击。大约可达 12公尺长和公尺长和 7 公公尺高，可重达尺高，可重达4 吨。吨。雷龙雷龙(Brontosaurus),formal name Apatosaurus(known Apatosaurus),is under the feet LiangLongKe caste eyes a generic,life in Jurassic rev.Murray
12、 order to mention the order,about 1 billion between 50 million years ago.They are the biggest animals on land,one of the existing body length about 26 meters,the weight between 24 to 32 tons.Their generic name in Greece for bogus of semantic lizard,it is because it is very much like the herringbone
13、bone jc dragon.LeiLong may weight 2.7 tons,and approximately 26 meters length,its neck 8 meters long,in fact,than body forehand return long.Its tail for about nine meters,it stood to the hips,about 4.5 meters high.But the lower half its body than shoulder high,but when it later heel support to stand
14、 up,its really like the towering mountains.It might live in plain and forest,and may do in droves.It may be the dragons megalosaurus)attack while the imaginary prey.Ray hindquarters huge,like exercising brawny,feet wide,limbs,DuanCu foreleg on toes on foot with 1,with three developed PAWS.LeiLong si
15、nce it was discovered later,then pedigree uncommon,at first people regard it as the heaviest dinosaurs.Later,an American oil company expensive,using its recovery?翼龙（翼龙（Pterosaur）Its original intent was to fly the reptiles.In the middle Triassic pterosaur on Earth was one of the first flight to the v
16、ertebrates,but it was suspected that the only illusory,at best gliding in the sky.However,recent research shows that the balance of their brain to deal with information well-developed nerve tissue,as can only pterosaur to fly like birds,but is likely to be master of flight.Shonisaurus pterodactylus Heteroaontosaurus plateosaurus elasmosaurus platyurus Rhamphorhynchus Compsognathus Why did dinersous disappear?谢谢观看！