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Home Q & A Board Science-Related Homework Help Physics Astronomy
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reubank reubank
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6 years ago
The interstellar medium is composed of mainly _____.
 
  a. equal parts of gas and dust
  b. mostly dust and some gas
  c. mostly gas and some dust
  d. dust only
 e. gas only

Question 2

During the growth of planetesimals to protoplanets, could the planetesimals have collided into one another? Why or why not?
 
  What will be an ideal response?

Question 3

Interstellar extinction and the reddening of light by the interstellar medium (ISM) are both caused by _____.
 
  a. atoms and molecules in the ISM
 b. only atoms in the ISM
 c. only molecules in the ISM
 d. only dust in the ISM
 e. dust, atoms and molecules of the ISM

Question 4

Outline a simple model of planet building.
 
  What will be an ideal response?
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bcspearsbcspears
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6 years ago
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reubank Author
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#2
6 years ago
Bravo! This is awesome
wrote...
#3
6 years ago
Glad my efforts were helpful
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