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Author Question: If we develop spacecraft that can take humans to nearby solar systems at a few percent of the speed ... (Read 61 times)

Haya94

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on: Jul 27, 2018
If we develop spacecraft that can take humans to nearby solar systems at a few percent of the speed of light, how long would it be before we could conceivably populate all habitable planets in the entire Milky Way?
 
  A) a few hundred thousand years
  B) a few million years
  C) a few hundreds of millions of years
  D) a few billion years
  E) We could never colonize the galaxy unless we had ships that could travel very close to the speed of light.

Question 2

Process of Science: Give a scientific explanation of the success of the central African rainfall-prediction technique of observing the waxing crescent Moon. Can the Moon cause a change in rainfall? Or vice versa?
 
  What will be an ideal response?


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chinwesucks

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

B

Answer to Question 2

The Moon's orientation varies seasonally, and so does the weather, so the orientation and the weather are correlated, but one does not cause the other.


Haya94

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Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

xiaomengxian

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Reply 3 on: Yesterday
Wow, this really help

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