We have always been interested in the moon.2000 years ago, people already knew that the moon moves a

We have always been interested in the moon.2000 years ago, people already knew that the moon moves around the earth and where it would be in the sky at different times of the year. At that time, everything about the moon was learned by watching it carefully in the sky. When scientists could use telescopes to study the moon more closely, their ideas began to change. They could see the moon was made of rocks. Most scientists thought moon rocks would be different from those on the earth. This was because they believed the moon had once been a planet that had been caught in the earth’s gravity millions of years earlier. In 1969, moon rocks werefinally brought to the earth and studied. Much to their surprise, scientists found that, except for water, the moon and the earth were made of the same things. Once again new ideas were needed for this new information. After years of study, most scientists now think that the moon was once part of the earth. They believe very early in its history, maybe 4 billion years ago, something about the size of Mars hit the earth. This sent billions of rocks into space around our planet. These rocks slowly joined together and after many years became the moon. In the future, even thought our ideas about the moon may change again, we will still be interested in it. 小题1:2000 years ago, people already knew_____.A．the earth moved around the moonB．the moon and the earth were made of the same thingsC．the moon was made of rocksD．the moon moves around the earth小题2:Before 1969, most scientists thought the moon was_____.A．part of the earth billions of years earlierB．older than the earthC．a planet caught by the earth’s gravityD．made of the same things as the earth小题3:After years of study, most scientists now think_____.A．the earth was once part of the moonB．the moon was once part of the earthC．something about the size of Mars will hit earth in the near futureD．a lot of rocks will slowly join together to become the other moon小题4:From this passage we can learn that_____.A．scientists in the past were not cleverB．scientists are so clever that they know everythingC．new information brings new ideasD．we now everything about the moon

Here are the answers based on the passage:

小题1: 2000 years ago, people already knew_____.
Answer: D. the moon moves around the earth

Explanation: The passage clearly states that 2000 years ago, people knew the moon moved around the earth.

小题2: Before 1969, most scientists thought the moon was_____.
Answer: C. a planet caught by the earth’s gravity

Explanation: The passage mentions that before 1969, most scientists thought the moon was a planet that had been caught in the earth’s gravity millions of years earlier.

小题3: After years of study, most scientists now think_____.
Answer: B. the moon was once part of the earth

Explanation: The passage concludes that after years of study, scientists now believe that the moon was once part of the earth, created by a massive collision.

小题4: From this passage we can learn that_____.
Answer: C. new information brings new ideas

Explanation: The passage highlights that as new information was discovered, scientists had to revise their ideas, particularly after studying the moon rocks brought back in 1969.

Hope that helps!