We search for intelligent life in the universe by:
A) sending out spacecraft with messages on them.
B) using radio telescopes to search for radio signals.
C) monitoring ultraviolet radiation emitted by stars.
D) all of the above
Correct Answer:
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Q11: Terrestrial life is carbon-based and requires _
Q12: Venus and Mars have little free oxygen
Q14: If we model the history of Earth
Q15: The early Earth suffered a long period
Q17: In 1952,chemists Harold Urey and Stanley Miller
Q18: Where do we think life first formed
Q19: If we model the age of the
Q20: Which of the following appeared most recently
Q26: Which one of the following is NOT
Q36: Carbon forms the backbone of our DNA
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