Answers created by Alex M.

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• How did life begin on earth according to evolution?
  
• How do electromagnetic waves transfer energy to matter?
  
• Have Pioneer 10 and 11 passed the sun yet?
  
• How do scientists know how many galaxies there are in the universe?
  
• Which planet has the greatest attraction to the sun?
  
• How does a star change over its life cycle?
  
• What would happen to a solar system if gravity suddenly stopped working?
  
• How does a galaxy differ from a constellation?
  
• What is the average lifespan of a star?
  
• How do stars in our galaxy differ from stars in other galaxies?
  
• What types of stars end their lives with supernovae?
  
• Which type of radiation would you look for in a star to demonstrate that nuclear fusion was occurring inside?
  
• How did the Big Bang create the universe?
  
• How was the earth formed? What evidence supports this?