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Author Question: Venus's tectonic processes seem to be vertical rather than horizontal. a. True b. False ... (Read 12 times)

awywial

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on: Jul 27, 2018
Venus's tectonic processes seem to be vertical rather than horizontal.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 2

What is a planetary nebula?
 
  What will be an ideal response?


xiazhe

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  • Posts: 331
Reply #1 on: Jul 27, 2018
Answer to Question 1

True

Answer to Question 2

A planetary nebula is a shell of gas that has been ejected during the evolution of a medium-mass star through a greatly increased stellar wind. The nebula is visible due to ionization from a central object (white dwarf) with a high surface temperature.


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