Chinese scientists found Changesite-(Y)—the sixth new lunar mineral in moon samples (样品) brought back by the Chang’e 5 lunar probe (探测器) in December 2020. It has become the first lunar mineral found by Chinese scientists, making China the third nation in the world, after the United States and Russia, to have achieved such a success, reported China Daily.

Changesite-(Y) looks crystal clear like a diamond (钻石). But its chemical content (化学组成) is different from any other known mineral. It has a high level of rare earth, reported China Science Daily. Li Ziying, chief scientist of the lunar sample research, said that the finding of this new mineral will help researchers study the history and physical traits (特征) of the moon. The value of the rare earth in it will also be studied.

Besides the new mineral, scientists also measured the content of helium-3 (氦-3) from the Chang’e 5 samples. Helium-3 is a valuable fuel (燃料) that can provide safer nuclear energy (核能). It is not radioactive (放射性的) and would not produce dangerous waste. On Earth, we have only 15 to 20 tons of helium-3 that can be used. But after studying the moon’s soil, scientists said there could be at least 1 million tons of helium-3 on the moon. That’s enough for all people on Earth to have clean energy for 10,000 years!

【小题1】How many kinds of lunar minerals have scientists found so far?

A．One.

B．Three.

C．Six.

D．Seven.

【小题2】According to the article, what still waits to be studied by scientists about the moon?

A．Its shape.

B．Its history.

C．Its looks.

D．Its size.

【小题3】What does the discovery of Helium-3 from the Chang’e 5 samples tell us?

A．Helium-3 will not produce any waste.	B．Helium-3 on the moon may be radioactive.
C．The moon can provide us with enough clean energy.	D．There is enough nuclear energy on the moon for humans.