听力音频：
L1
讲座
1. What is the lecture mainly about?
Two theories about early astronomical concepts in the Americas
How different cultures created calendars based on astronomical observations
How astronomy helps to identify the functions of archaeological sites
Similar construction methods found at different archaeological sites in the Americas
2. What does the professor say about a round Mayan building?
It shows how the Maya were influenced by the builders of the medicine wheel.
It has carvings showing the phases of the planet Venus.
Its placement suggests that it served as a ceremonial site
It was used for observing the planet Venus.
3. Why does the professor emphasize the size and location of the Bighorn Medicine Wheel?
To point out its similarity to structures in Mexico and Central America
To assert that its astronomical function should have been obvious
To show why early hypotheses about its use were unlikely
To explain which group of Native Americans probably built it
4. What did John Eddy find out about the Bighorn Medicine Wheel that classifies it as a type of observatory?
The wheel has the same number of spokes as a year has lunar months.
The wheel indicates where the Sun rises or sets at certain times of the year.
The wheel’s circular shape symbolizes the Sun.
The wheel’s location provides an unobstructed view of the sky.
5. What was a result of John Eddy’s discovery that the Bighorn Medicine Wheel was a type of observatory?
It led to collaboration between astronomers and archaeologists on other archaeological sites.
It allowed archaeologists to accurately date the construction of the Bighorn Medicine Wheel.
It led to proof that the Native Americans in Wyoming had contact with the Maya.
It led to proof that the planet Venus was important to many ancient cultures.
6. Why does the professor say this:
To clarify the point the student is trying to make
To encourage students to make accurate observations when conducting research
To indicate that the term used by the student has more than one meaning
To point out that some ancient calendars are very accurate
