TOEFL Listening Practice Test 2

What is the professor mainly discussing?

• How the moon formed after a giant object impacted the Earth

• The composition of the moon in comparison to Earth

• Problems with theories about the origin of the moon

• Whether or not the moon was connected to the Earth at one point

How is the lecture organized?

• The professor discusses information previously learned before introducing a new idea

• The professor introduces an experiment and some possible problems with it

• The professor compares theories about the moon with other objects in space

• The professor gives a historical account of theories on the origin of the moon

What are some problems with the capture theory? Select two.

• There are too many chemical differences between the Earth and the moon

• It is more plausible that the Earth and the moon were never connected

• During entry into the solar system, the moon would have had too much energy to be captured

• The moon would have a strange orbital path if it were captured by Earth

Which theory about the moon is most likely true?

• The fission theory

• The giant impact hypothesis

• The sister theory

• The capture theory

What does the professor imply about the sister theory?

• Modern astronomers do not believe this theory is correct

• It explains why the moon is made out of the same materials as Earth

• The density of the moon compared to Earth proves it is true

• It was less popular than the capture and fission theories

Why is the giant impact hypothesis also problematic?

• The impact likely would have caused Earth to break apart into many pieces

• The moon is too small for such an impact

• There is more proof that the sister theory is correct

• There is no way to prove it is correct