Ispravci

The water on the Earth

• In the lecture, the professor made several points about the question of the origin of the water on the Earth.

• The professor argues there are a lot of explanations that the water did not come from outer space.

• The professor’s lecture casts doubt on the reading by using a number of points that are contrary to that the water has extraterrestrial origins.

• The first point that the professor uses to cast doubt on the reading is that if people cannot find the water on other planets, it does not mean that there is not it there.

• For example, frozen water was found under the surface of the Mars, but scientists cannot to make extensive researches at the present.

• However, this information differs from the reading in that the reading states that the water came from outer space, because there is the lack of water on other planets.

• Another point that the professor uses to cast doubt on the reading is that comets are made with rocks, not with ice.

• The professor claims comets could not be the source of the water on the Earth.

• However, the reading states these objects have a lot of water, in the past ages they hit our planet and formed the Earth’s oceans.

• Also the article claims that if to compare the content of comets and ocean water, they both have deuterium.

• It can be the evidence that the water on the Earth derived from these ice comets.

• However, the professor explains that comets have double amounts of this chemical element than in oceans.