5. What was the passage mostly about?
C. the problem of space junk and scientists' attempts to solve this problem
10. Different countries have explored or are exploring different methods to clean up space junk. Explain why some methods may be more effective than others. Use evidence from the text to support your answer.
Answers may vary and should be supported by the text.
3. Trash has become a problem in outer space too. What evidence from the text best supports this statement?
D. According to BBC News, there are more than 22,000 pieces of junk in space around the earth.
4.Why have countries agreed to build space tools that must fall safely into the earth's atmosphere?
B. so that the tools burn up in the atmosphere and don't become space junk
1.What has left tons of “space junk” in orbit around the earth?
years of space exploration
9. What have the Germans done to help clean up space junk?
The Germans have been planning a space mission with robots that would collect pieces of space trash and bring them back to Earth so that they can be safely dest
2.Countries around the world have agreed to limit the time their space tools stay in orbit to 25 years. As explained in the passage, what problem does this solution address?
A. the increasing amount of space junk in orbit around the earth
7. Choose the answer that best completes the sentence below. Years of space exploration have left tons of "space junk," _______ many scientists are trying to find a way to clean up outer space.
A. so
8. What did the 2009 collision of a United States satellite and a Russian satellite cause?
This collision caused the satellites to break into more than 2000 pieces
6. Read the sentence: XXXXXXX :What does the word urgent most nearly mean?
C. needs immediate attention