Store bought soil is probably loaded with organic materials that will help plants, while some outside soil may be lighter in color and lacking these materials. But that all depends on the location of the outside soil. Science Fair projects are so fun! Enjoy.
You're better off with potting mix because soil from outside has weed seeds and pathogens in it.
it has better texture
well it better in soil because soil has more nutrients
soil as there are more nutrients
a plant grows better in soil
soil is better dan sand for backfill.
the plant with better soil will grow better
Soil has better stability because it can be wet and have better strength than sand...
soil
no
soil
Fertilized soil