why does the earth look smooth from space if there’s mountains on it?

Question: why does the earth look smooth from space if there's mountains on it?
- Keywords:
  earth,
  mountains,
  space
Asked by anon-223702 to Valerio, Sreejita, Sam, Kate, Anastasia, Adam on 19 Nov 2019.
- Sreejita Ghosh answered on 19 Nov 2019:
  
  Since the ratio of the height of mountains on earth, and the distance between the observer in space and the mountains on earth, is very low, with relatively low resolution cameras the difference in heights between mountains, valleys, etc might not be seen. This would cause the earth to look smooth, I think.
- Adam Wootton answered on 20 Nov 2019:
  
  When something is very small or far away, it’s difficult to see the fine details. Look at this image of a human hair under a microscope – it looks very difficult to a human hair as we see it with our eyes!

Question: why does the earth look smooth from space if there's mountains on it?