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Author Question: Hydrogen lines are weaker in both very hot and very cool stars. Indicate whether the statement is ... (Read 23 times)

Deast7027

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on: Jul 27, 2018
Hydrogen lines are weaker in both very hot and very cool stars.
 
  Indicate whether the statement is true or false

Question 2

In plate tectonics, how are trenches formed? What always accompanies them?
 
  What will be an ideal response?


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connor417

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

TRUE

Answer to Question 2

Trenches are the deep places in the oceans where denser basaltic plates are subducted beneath lighter continental ones. The heat of this subduction always gives rise to volcanic chains immediately above the subduction zone, such as the Nazca Trench off South America and the Andes immediately east of it.


Deast7027

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Reply 2 on: Jul 27, 2018
Gracias!

Jsherida

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Reply 3 on: Yesterday
Wow, this really help

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