Author Question: Unlike the United States, Canada has experienced considerable emigration, or out-migration, most ... (Read 208 times)

erika

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Unlike the United States, Canada has experienced considerable emigration, or out-migration, most often to Europe.
 
  Indicate whether the statement is true or false

Question 2

Why are bright, blue stars and dim, red stars not good candidates for supporting habitable planets?
 
  What will be an ideal response?



marict

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Answer to Question 1

FALSE

Answer to Question 2

For dim, red stars, the habitable zone typically exists within the tidal locking radius of the star, which forces the same side of a planet in the habitable zone to face the star at all times. This is detrimental to the habitability of the planet, as the two sides of the planet will experience extreme conditions.
Bright, blue stars spend a relatively small amount of time in the main-sequence stage of their evolution. This leaves significantly less time for life to evolve, thus decreasing the habitability of the planet. Furthermore, bright, blue stars have high UV fluxes which could be detrimental to life, particularly for plants on a planet without a significant UV screen.



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