approach

a) Seen from a skyscraper, a man looks like a speck of dust.

What about:

1. 1. 1. blade of grass in the middle of a field ?
      2. a star, in the Milky Way ?
      3. the Milky Way in the Universe ?
      4. an electron and its nucleus ?
      5. a raft on the open sea ?
      6. a bird on the horizon ?

b) Seen through a microscope, a speck of dust reveals a universe.

What about:

1. 1. 1. a rose petal ?
      2. a stone fragment ?
      3. a slip of paper ?
      4. a potato peel ?
      5. a butterfly’s wing ?
      6. a flea ?