The origin and evolution of earth地球的起源和演化英文版[精品].doc

The origin and evolution of earth FASHI JIANG The earth is a planet in the solar system, tilting in the ecliptic plane around the sun once a year, and rotates once a day. The earth following the sun turn around the galactic center, tilting in the galactic plane, turning around the galactic center for more than 200 million years. The earth and the moon are the earth-moon system, and the moon turns around the earth once a month. The earth is a sphere with a layered structure. There are volcanic eruptions, earthquakes. The rocks and strata have been moved or bent. The south pole of earth is lower then the sphere but with high mountains, which is Antarctica. The north pole is higher and covered by the Arctic ocean. The earth exist the magnetic filed, the geomagnetic poles reverse and pole movement happened in the geological history. There are plenty of living creatures on the earth. Lower plants and higher plants, lower animals and higher animals live on earth together. Prokaryotic low fossils is mainly seen in per- Paleozoic strata. In Paleozoic, the orginism began explosive appearance and there were tall plants and large animals in the Mesozoic. During the Cenozoic there were higher beings. There are a large number of coals in Antarctica. Coal was formed by plants through the coal geology. The environment of Antarctica is the snow and ice, it is impossible to grow a lot of plant. There are many times of transgressions and regressions in the geology history. Where did the formation of earth come from , in what time and what position. Why does the earth rotation and revolution, and why the earth exists activities in its internal. How did the lives in earth form? A complete theory of the origin and evolution of earth shall make a reasonable explanation for those phenomenon and questions. 1.Galaxy 1.1 Galaxy The earth with the Milky Way, the solar system, and the moon formed galaxy relations, under the control of the galactic center and the sun’s gravity around the rot