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Author Question: Given that there are several hundred billion stars in the Milky Way Galaxy and preliminary data from ... (Read 67 times)

drink

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on: Jul 27, 2018
Given that there are several hundred billion stars in the Milky Way Galaxy and preliminary data from exoplanet studies suggest that as many as one in five star systems may have one or more habitable planets, then a reasonable estimate for the number
 
  of habitable planets could be about A) 100 billion or more
  B) 1 billion or more
  C) 100 million or more
  D) 10 million or more

Question 2

Which of the following alternatives to water has a wider temperature range over which it is a liquid?
 
  A) ammonia
  B) methanol
  C) methane
  D) ethane


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bubulittle310@msn.cn

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Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

B


drink

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Reply #2 on: Jul 27, 2018
Thanks


bubulittle310@msn.cn

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Reply #3 on: Jul 27, 2018
Welcome :)


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