Students enrolling in Carnegie Mellon University Tepper School of Business have an average GMAT of 690, which is much higher than average compared to all business schools (613).
But how did it end up being this pure in most parts of the Moon? The secondary event that explains it, notes the report, is what researchers are calling a crustal overturn. Old impure plagioclase was replaced by hot, pure plagioclase as the moon cooled rapidly. Asteroid hits, space dust, and other harsh space conditions could have also sheared away the surface impurities, notes the report.
The major factor which does change the Moonâs surface is the impact of meteoroids, forming craters. Even this process is very slow today; most of the Moonâs craters, and all of the large ones, are hundreds of millions to billions of years old. The surface of the Moon is very old, compared to the Earth. Ask the students to think about why the Moon and the Earth are different.