Hypertonic solution: higher concentration outside of cell = lower water potential = water exits cell, cell shrink (crenated-animal cell, flaccid/plasmolysed-plant cell)
Hypotonic solution: lower concentration outside cell =higher water potential = water enters cell, cell swell (animal cell - burst,plant cell - turgid)
The answer is called Diffusion.
The milky way is a spiral galaxy.
Old existing cells.......
The second answer
Temperatures up high need to be warmer near the surface, surface air needs to be humid