TPO57L2 Craters (Astronomy)



1. What is the lecture mainly about?

A. The formation and physical characteristics of craters

B. Methods for determining the age of impact craters

C. Differences between craters on planets and moons in the inner solar system

D. Problems with using craters to date surfaces of planets and moons


2. Why does the professor mention rocks from Earth’s moon?

A. To compare the surface of Earth’ s moon to the surface of a moon of Jupiter

B. To stress the need for further exploration of space

C. To explain a way of calculating the absolute age of surfaces of planets or moons

D. To show how to identify a secondary impact on the surface of Earth’ s moon


3. According to the professor, what are secondary impacts? 

A. Impacts of fragments thrown outward by a previous impact

B. Impacts of objects from outside the asteroid belt

C. Impacts of smaller asteroids in the asteroid belt

D. Impacts in areas of a moon or planet other than those primarily studied


4. According to the professor, what do scientists consider when trying to determine whether an impact was primary or secondary? Click on 2 answers.

A. The size of the crater

B. The shape of the crater

C. The crater’s location in relation to other craters

D. The age of the crater


5. Based on observations of the crater Zunil, what does the professor imply are more common than previously believed? Click on 2 answers.

A. Small objects moving rapidly through space

B. Craters caused by secondary impacts on Earth’s moon

C. Lava flows on the surfaces of planets and moons 

D. Secondary impacts resulting from a single primary impact


6. What does the professor imply about information obtained from space probes? 

A. The information was probably distorted during transmission to Earth

B. The information helped determine the age of most planetary surface features. 

C. Some of the information is a t present difficult to interpret correctly

D. The information applies only to the moons of Jupiter.


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