6. It can be inferred from the passage that debris was harmful to one of the space shuttles because the debris was ________.
A. large B. moving very fast
C. radioactiveD. burning uncontrollably
7. What effect did orbital debris have on one of the space shuttles?
A. It removed some of the paint.B. It damaged one of the windows.
C. It caused a loss of altitude.D. It led to a collision with a space station.
8. The word “them” in the third sentence in paragraph 2 refers to which of the following?
A. Astronauts.B. Wastes.
C. Tests.D. Crew modules.
9. Which of the following questions is NOT answered by the information in the passage?
A. How can small objects orbiting the earth be seen?
B. What is being done to prevent orbital debris from increasing?
C. Why is the risk of damage to space equipment likely to increase?
D. When did the United States Air Force begin making tests in space?
10. Where in the passage does the writer mention a method of protecting space vehicles against damage by space debris?
A. Line 6-8B. Line 10-11
C. Line 11-13D. Line 13-14