8.26 进军美利坚的花花的作文

arimidyUID: 2673973

      
In the lecture, the professor gives three points to claim that the criticism about the giant impact theory is not convincing.

      First, the reading material says that there's no trace of the giant impact which has been found on the surface of the Earth. The speaker corrects it by saying that as the impact happened nearly 4 billion years ago, the trace may have been erased by the force of nature. During this time, many collisions appeared on the Earth's surface and they changed the map of the planet a lot. So the mark may have disappeared by the collision.   

      Second, the writer points out that the rocks on the Moon contain little water which is quite different from rocks on the Earth. The lecturer says that the heat from the space collisions on the Moon made the Moon molten. So the temperature on the Moon is extremely high, and any water on it evaporated to space. Thus, it is not surprising that rocks on the Moon contain no water.
      
      Third, the author claims that the density of the Moon is lower than that of the Earth. The speaker gives evidence that as the giant-impact happened on the surface of the Earth, the Moon's density should be equal to the Earth's surface, and it had been proved that the speaker is right.

ly8768UID: 2452066

In the lecture, the professor gives three points to claim that the criticism about the giant impact theory is not convincing.(这个逻辑错了，professor是支持giant-impact theory的)

First, the reading material says that there's no trace of the giant impact which has been found on the surface of the Earth. The speaker corrects it by saying that as the impact happened nearly 4 billion years ago, the trace may have been erased by the force of nature. During this time, many collisions appeared on the Earth's surface and they changed the map of the planet a lot. So the mark may have disappeared by the collision.

记录得真详细，连那个erase都记录了

Second, the writer points out that the rocks on the Moon contain little water which is quite different from rocks on the Earth. The lecturer says that the heat from the space collisions on the Moon made the Moon molten. So the temperature on the Moon is extremely high, and any water on it evaporated to space. Thus, it is not surprising that rocks on the Moon contain no water.

Third, the author claims that the density of the Moon is lower than that of the Earth. The speaker gives evidence that as the giant-impact happened on the surface of the Earth, the Moon's density should be equal to the Earth's surface, and it had been proved that the speaker is right.

这次花花怎么没总结段了